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Centered figurate number that represents a triangle with a dot in the center
A centered (or centred) triangular number is a centered figurate number that represents an equilateral triangle with a dot in the center and all its other
Centered_triangular_number
centered square number, Mertens function zero 1014 = 210-10, Mertens function zero, sum of the nontriangular numbers between successive triangular numbers
1000_(number)
Figurate number
arranged in an equilateral triangle. The triangular lattice representing the n {\displaystyle n} th triangular number contains n {\displaystyle n} rows: the
Triangular_number
Class of series of figurate numbers, each having a central dot
centered k-gonal number contains k more dots than the previous layer. Each centered k-gonal number in the series is k times the previous triangular number
Centered_polygonal_number
Natural number
the natural number following 45 and preceding 47. 46 is a composite number, a centered triangular number, and a Wedderburn-Etherington number, and an Erdős–Woods
46_(number)
Natural number
to 38, or twice 19. A hexaflexagon is a strip of nineteen alternating triangular faces that can flex into a regular hexagon, such that any two of six colorings
19_(number)
Natural number
in the form 2² × 79. 316 is a centered triangular number and a centered heptagonal number. 316 is also an Ulam number and a member of one Tetranacci
316_(number)
Natural number
prime number, a Cuban prime, a Lucky prime a Chen prime, a centered triangular number, a centered hexagonal number, and a lazy caterer number (sequence
600_(number)
Natural number
23,1,0). an octahedral number. a centered triangular number. a centered square number. a decagonal number. the smallest number that can be expressed as
85_(number)
Square of a triangular number
In number theory, the sum of the first n cubes is the square of the nth triangular number. That is, 1 3 + 2 3 + 3 3 + ⋯ + n 3 = ( 1 + 2 + 3 + ⋯ + n ) 2
Squared_triangular_number
Natural number
Harshad number and a pentagonal pyramidal number. 406 = 2 × 7 × 29. It is a sphenic number, the 28th triangular number, a centered nonagonal number, an even
400_(number)
Natural number
19 2 , {\displaystyle 361=19^{2},} centered triangular number, centered octagonal number, centered decagonal number, member of the Mian–Chowla sequence
360_(number)
Polyhedral number representing a tetrahedron
A tetrahedral number, or triangular pyramidal number, is a figurate number that represents a pyramid with a triangular base and three sides, called a tetrahedron
Tetrahedral_number
Natural number
in bases 2 (10000000012) and 8 (10018). 514 = 2 × 257. It is a centered triangular number and a nontotient. It is a palindrome in bases 4 (200024), 16 (20216)
500_(number)
Natural number
previous prime is 107, making them both twin primes. 109 is a centered triangular number. There are exactly: 109 different families of subsets of a three-element
109_(number)
Number that represents a hexagon with a dot in the center
combinatorics, a centered hexagonal number, or centered hexagon number, is a centered figurate number that represents a hexagon with a dot in the center and all
Centered_hexagonal_number
Natural number
pronic number, a nontotient, and a Harshad number. 703 = 19 × 37. It is a hexagonal number, a Kaprekar number and the 37th triangular number. It is the
700_(number)
Natural number
× 53, centered triangular number, happy number 902 = 2 × 11 × 41, sphenic number, nontotient, Harshad number 903 = 3 × 7 × 43, sphenic number, 42nd triangular
900_(number)
Number of dots in a centred dot square
elementary number theory, a centered square number is a centered figurate number that gives the number of dots in a square with a dot in the center and all
Centered_square_number
Natural number
Additionally, 235 is: a semiprime a heptagonal number a centered triangular number therefore a figurate number in two ways palindromic in bases 4 (32234)
235_(number)
Integer that is both a perfect square and a triangular number
mathematics, a square triangular number (or triangular square number) is a number which is both a triangular number and a square number, in other words, the
Square_triangular_number
Natural number
is the natural number following 165 and preceding 167. 166 is an even number and a composite number. It is a centered triangular number. Given 166, the
166_(number)
Natural number
strictly non-palindromic number. 361 = 192. 361 is a centered triangular number, a centered octagonal number, a centered decagonal number and a member of the
300_(number)
Figurate number
A pentagonal number is a figurate number that extends the concept of triangular and square numbers to the pentagon, but, unlike the first two, the patterns
Pentagonal_number
Centered figurate number that represents a pentagon with a dot in the center
In mathematics, a centered pentagonal number is a centered figurate number that represents a pentagon with a dot in the center and all other dots surrounding
Centered_pentagonal_number
Centered figurate number that represents a nonagon with a dot in the center
to triangular numbers: every third triangular number (the 1st, 4th, 7th, etc.) is also a centered nonagonal number. Thus, the first few centered nonagonal
Centered_nonagonal_number
Natural number
quadruplet with 821, 823, and 827. It is a centered triangular number. 830 = 2 × 5 × 83. It is a sphenic number, a nontotient, the totient sum of the first
800_(number)
Centered figurate number
also called centered dodecagonal numbers because star numbers are centered polygonal numbers with a twelve-sided shape. The nth star number is given by
Star_number
Natural number
3046 – centered heptagonal number 3052 – decagonal number 3059 – centered cube number 3061 – prime of the form 2p-1 3063 – perfect totient number 3067 –
3000_(number)
Type of figurate number
properties of oblong, triangular, and square numbers. The number 10 for example, can be arranged as a triangle (see triangular number): But 10 cannot be
Polygonal_number
Centered figurate number that represents a decagon with a dot in the center
base 10, the centered decagonal numbers can be obtained by simply adding a 1 to the right of each triangular number. Therefore, all centered decagonal numbers
Centered_decagonal_number
Type of figurate number
number is a triangular number, but only every other triangular number (the 1st, 3rd, 5th, 7th, etc.) is a hexagonal number. Like a triangular number,
Hexagonal_number
Product of an integer with itself
A square number is also the sum of two consecutive triangular numbers. The sum of two consecutive square numbers is a centered square number. Every odd
Square_number
Natural number
telephone number, amicable number with 2924 2625 = a centered octahedral number 2626 – decagonal number 2628 – triangular number 2632 – number of consecutive
2000_(number)
Size of a geometric arrangement of points
The term figurate number is used by different writers for members of different sets of numbers, generalizing from triangular numbers to different shapes
Figurate_number
Number equal to the sum of its proper divisors
2^{p-1}(2^{p}-1)} , each even perfect number is the ( 2 p − 1 ) {\displaystyle (2^{p}-1)} -th triangular number (and hence equal to the sum of the integers
Perfect_number
Centered figurate number that counts points in a three-dimensional pattern
is the number of points in a body-centered cubic pattern within a cube that has n + 1 points along each of its edges. The first few centered cube numbers
Centered_cube_number
Natural number
number following 189 and preceding 191. 190 is a triangular number, a hexagonal number, and a centered nonagonal number, the fourth figurate number (after
190_(number)
Natural number
(four thousand) is the natural number following 3999 and preceding 4001. It is a decagonal number. 4005 – triangular number 4007 – safe prime 4010 – magic
4000_(number)
Number, product of consecutive integers
triangular number and n more than the nth square number, as given by the alternative formula n2 + n for pronic numbers. Hence the nth pronic number and
Pronic_number
Centered figurate number representing an octahedron
In mathematics, a centered octahedral number or Haüy octahedral number is a figurate number that counts the points of a three-dimensional integer lattice
Centered_octahedral_number
Ten raised to an integer power
the number ten; in other words, ten multiplied by itself a certain number of times (when the power is a positive integer). By definition, the number one
Power_of_10
Centered figurate number representing a tetrahedron
In mathematics, a centered tetrahedral number is a centered figurate number that represents a tetrahedron. That is, it counts the dots in a three-dimensional
Centered_tetrahedral_number
Iterative algorithm on numbers
In number theory, Kaprekar’s routine is an iterative algorithm named after its inventor, Indian mathematician D. R. Kaprekar. Each iteration starts with
Kaprekar's_routine
Natural number
= 7!, superior highly composite number 5041 = 712, centered octagonal number 5050 – triangular number, Kaprekar number, sum of first 100 integers 5051
5000_(number)
Natural number
432 + 442 7246 – centered heptagonal number 7247 – safe prime 7260 – triangular number 7267 – decagonal number 7272 – Kaprekar number 7283 – super-prime
7000_(number)
Integer having a non-trivial divisor
A composite number is a positive integer that can be formed by multiplying two smaller positive integers. Accordingly, it is a positive integer that has
Composite_number
Number divisible only by 1 and itself
A prime number (or a prime) is a natural number greater than 1 that is not a product of two smaller natural numbers. A natural number greater than 1 that
Prime_number
Natural number
is the natural number following 34 and preceding 36. 35 is the sum of the first five triangular numbers, making it a tetrahedral number. 35 is the 10th
35_(number)
Type of figurate number
A nonagonal number, or an enneagonal number, is a figurate number that extends the concept of triangular and square numbers to the nonagon (a nine-sided
Nonagonal_number
Natural number
smallest 12-digit prime number. 100,000,147,984 = 3162282, the smallest 12-digit square. 100,000,404,505 = smallest triangular number with 12 digits and the
100,000,000,000
Natural number
represents the number of demons in a legion of demons.[citation needed] 6670 – triangular number, centered nonagonal number, centered 19-gonal number, 6719 –
6000_(number)
Centered figurate number that represents an octagon with a dot in the center
centered octagonal number is a centered figurate number that represents an octagon with a dot in the center and all other dots surrounding the center
Centered_octagonal_number
Natural number
comprises a twin prime. 151 is also a palindromic prime, a centered decagonal number, and a lucky number. 151 appears in the Padovan sequence, preceded by the
151_(number)
Centered polygonal number Centered square number Centered pentagonal number Centered hexagonal number Tetrahedral number Pyramidal number Triangular pyramidal
List of recreational number theory topics
List_of_recreational_number_theory_topics
Centered figurate number that represents a heptagon with a dot in the center
A centered heptagonal number is a centered figurate number that represents a heptagon with a dot in the center and all other dots surrounding the center
Centered_heptagonal_number
Natural number
9283 – centered heptagonal number 9293 – Sophie Germain prime, super-prime 9316 – triangular number 9319 – super-prime 9334 – nonagonal number 9349 –
9000_(number)
Geometric pattern used in art
the previous circle's center. The second circle is centered at any point on the first circle. All following circles are centered on the intersection of
Overlapping_circles_grid
Natural number
composite number in the 11-aliquot tree. (91, 51, 21, 18). the 13th triangular number. a hexagonal number, one of the few such numbers to also be a centered hexagonal
91_(number)
Natural number between 89 and 91
triangular number 78 is the only number to have an aliquot sum equal to 90, aside from the square of the twenty-fourth prime, 892 (which is centered octagonal)
90_(number)
Number used to approximate the square root of 2
identity describes a square number, while the right side describes a triangular number, so the result is a square triangular number. Falcón and Díaz-Barrero
Pell_number
Natural number
without a twin prime. 37 is the third star number and the fourth centered hexagonal number. The sum of the squares of the first 37 primes is divisible by
37_(number)
Concept in combinatorics
In mathematics, the cake number, denoted by Cn, is the maximum of the number of regions into which a 3-dimensional cube can be partitioned by exactly
Cake_number
Number of stacked spheres in a pyramid
square pyramidal number. The number of rectangles in a square grid is given by the squared triangular numbers. The square pyramidal number P n {\displaystyle
Square_pyramidal_number
Type of figurate number
additional layer. Centered tetrahedral numbers Centered cube numbers Centered octahedral numbers Centered dodecahedral numbers Centered icosahedral numbers
Centered_polyhedral_number
Type of composite integer
In number theory, a Smith number is a composite number for which, in a given number base, the sum of its digits is equal to the sum of the digits in its
Smith_number
Base-dependent property of integers
In mathematics, a natural number in a given number base is a p {\displaystyle p} -Kaprekar number if the representation of its square in that base can
Kaprekar_number
Numbers with many divisors
highly composite number is a positive integer that has more divisors than all smaller positive integers. If d(n) denotes the number of divisors of a positive
Highly_composite_number
Class of binary number
In number theory, an evil number is a non-negative integer that has an even number of 1s in its binary expansion. These numbers give the positions of
Evil_number
Type of Poulet number
In number theory, a super-Poulet number is a Poulet number, or pseudoprime to base 2, whose every divisor d {\displaystyle d} divides 2 d − 2 {\displaystyle
Super-Poulet_number
Numbers with a certain property involving recursive summation
In number theory, a happy number is a number which eventually reaches 1 when the number is replaced by the sum of the square of each digit. For instance
Happy_number
Number whose divisors summed twice over equal twice itself
In number theory, a superperfect number is a positive integer n that satisfies σ 2 ( n ) = σ ( σ ( n ) ) = 2 n , {\displaystyle \sigma ^{2}(n)=\sigma (\sigma
Superperfect_number
Natural number
pyramidal number 8558 – Large Schröder number 8576 – centered heptagonal number 8581 – super-prime 8625 – nonagonal number 8646 – triangular number 8649 =
8000_(number)
Prime number of the form 2^n – 1
mathematics, a Mersenne prime is a prime number that is one less than a power of two. That is, it is a prime number of the form Mn = 2n − 1 for some integer
Mersenne_prime
Abundant number whose proper divisors are all deficient numbers
primitive abundant number is an abundant number whose proper divisors are all deficient numbers. For example, 20 is a primitive abundant number because: The
Primitive_abundant_number
Numbers obtained by adding the two previous ones
The only triangular Fibonacci numbers are 1, 3, 21, and 55, which was conjectured by Vern Hoggatt and proved by Luo Ming. No Fibonacci number can be a
Fibonacci_sequence
Count of permutations by cycles
second kind can be understood as inverses of one another when viewed as triangular matrices. This article is devoted to specifics of Stirling numbers of
Stirling numbers of the first kind
Stirling_numbers_of_the_first_kind
Concept in number theory
In number theory, a narcissistic number (also known as a pluperfect digital invariant (PPDI), an Armstrong number (after Michael F. Armstrong) or a plus
Narcissistic_number
Type of number introduced by Mike Keith
mathematics, a Keith number or repfigit number (short for repetitive Fibonacci-like digit) is a natural number n {\displaystyle n} in a given number base b {\displaystyle
Keith_number
Numbers that contain only the digit 1
In recreational mathematics, a repunit is a number like 11, 111, or 1111 that contains only the digit 1 — a more specific type of repdigit. The term stands
Repunit
Integer divisible by sum of its digits
In recreational mathematics, a harshad number (or Niven number) in a given number base is an integer that is divisible by the sum of its digits when written
Harshad_number
Type of composite number with an even number of digits
recreational mathematics, a vampire number (or true vampire number) is a composite natural number with an even number of digits, that can be factored into
Vampire_number
Integer having only small prime factors
In number theory, an n-smooth (or n-friable) number is an integer whose prime factors are all less than or equal to n. For example, a 7-smooth number is
Smooth_number
Number that is less than the sum of its proper divisors
In number theory, an abundant number or excessive number is a positive integer for which the sum of its proper divisors is greater than the number. The
Abundant_number
Natural number
natural number following 230 and preceding 232. 231 is a sphenic number. 231 is the 21st triangular number, a doubly triangular number, a hexagonal number, an
231_(number)
Natural number
figurate number it is the 23rd triangular number, a hexagonal number, and a centered pentagonal number, the third number after 1 and 6 to have this combination
276_(number)
Natural number
same amount of digits the 22nd triangular number. a star number. a centered heptagonal number. a centered nonagonal number. a Blum integer. a member of
253_(number)
Type of natural number
In number theory, a colossally abundant number (sometimes abbreviated as CA) is a natural number that, in a particular, rigorous sense, has many divisors
Colossally_abundant_number
Regular tiling of the plane
In geometry, the triangular tiling or triangular tessellation is one of the three regular tilings of the Euclidean plane, and is the only such tiling
Triangular_tiling
Recursive integer sequence
they were previously discovered in the 1730s by Minggatu. The n-th Catalan number can be expressed directly in terms of the central binomial coefficients
Catalan_number
Number used for counting
natural-number results: subtracting a larger natural number from a smaller one results in a negative number and dividing one natural number by another
Natural_number
Numbers parameterizing ways to partition a set
second kind can be understood as inverses of one another when viewed as triangular matrices. This article is devoted to specifics of Stirling numbers of
Stirling numbers of the second kind
Stirling_numbers_of_the_second_kind
Centered figurate number representing a dodecahedron
mathematics, a centered dodecahedral number is a centered figurate number that represents a dodecahedron. The centered dodecahedral number for a specific
Centered_dodecahedral_number
Type of integer in number theory
and polite representations, suppose a number x has the odd divisor y > 1. Then y consecutive integers centered on x/y (so that their average value is
Polite_number
Integer whose multiples are digit rotations
A cyclic number is an integer for which cyclic permutations of the digits are successive integer multiples of the number. The most widely known is the
Cyclic_number
Number that remains the same when its digits are reversed
A palindromic number (also known as a numeral palindrome or a numeric palindrome) is a number (such as 16361) that remains the same when its digits are
Palindromic_number
Positive integer that is the product of three distinct prime numbers
In number theory, a sphenic number (from Ancient Greek: σφήν, 'wedge') is a positive integer that is the product of three distinct prime numbers. For
Sphenic_number
Infinite integer series where the next number is the sum of the two preceding it
numbers two terms apart in the Fibonacci sequence results in the Lucas number in between. The first few Lucas numbers are 2, 1, 3, 4, 7, 11, 18, 29, 47
Lucas_number
Type of positive integer
In number theory, a positive integer k is said to be an Erdős–Woods number if it has the following property: there exists a positive integer a such that
Erdős–Woods_number
Solid with four equal triangular faces
A regular tetrahedron is a polyhedron with four equilateral triangular faces. A regular tetrahedron is a tetrahedron (that is, a four-sided polyhedron)
Regular_tetrahedron
CENTERED TRIANGULAR-NUMBER
CENTERED TRIANGULAR-NUMBER
Boy/Male
American, British, English
Lives in the Triangular Farm Stead
Boy/Male
Hindu, Indian, Marathi, Sanskrit
Center
Boy/Male
Indian
Centered
Boy/Male
Arabic, Muslim
Censured; Blamed
Boy/Male
British, English
Spear; Wedge-shaped Object; Triangular Shaped Piece of Land
Biblical
prisoner; fettered
Boy/Male
American, Australian, British, Christian, English, German
Hill Near Meadows; Triangular Hill; Spacious Fort
Boy/Male
American, British, English
Battlefield; From the Triangular Field
Boy/Male
African, American, Anglo, Australian, British, Christian, English, Jamaican
Battlefield; Spear Field; Triangular Field
Boy/Male
English
From the triangular field.
Boy/Male
Biblical
Prisoner; fettered.
Boy/Male
Muslim
Censured, Blamed
Boy/Male
English
Lives in the triangular farm stead.
Boy/Male
Tamil
Prankit | பà¯à®°à®¨à¯à®•à®¿à®¤
Center of attraction
Prankit | பà¯à®°à®¨à¯à®•à®¿à®¤
Boy/Male
Hindu, Indian, Sanskrit
The Heart Center
Biblical
fettered by beauty
Surname or Lastname
English
English : metonymic occupational name for a maker of belts and girdles, from Middle English ceinture, ceintere ‘girdle’.Possibly an Americanized form of German Zehnder, a variant of Zehner.
Boy/Male
Muslim
Centered
Boy/Male
Arabic, Muslim
Centred
Boy/Male
Anglo, Australian, British, English, French
From the Cornered Hill; Hill Near Meadows; Triangular Hill
CENTERED TRIANGULAR-NUMBER
CENTERED TRIANGULAR-NUMBER
Girl/Female
Gujarati, Hindu, Indian, Malayalam
Goddess Parvati
Boy/Male
Arabic
Well Done
Girl/Female
Indian
Name of a sahabiyyah, Pure, Clear
Boy/Male
Teutonic American German French
Lion.
Boy/Male
Muslim/Islamic
Gainer
Male
English
Anglicized form of Irish Gaelic Seán, SEAN means "God is gracious."
Girl/Female
American, Australian, British, Chinese, Christian, English, German, Greek
Truthful; Noble Sort; Variant of Alice
Female
English
Feminine form of English Steven, STEVANIA means "crown."
Girl/Female
Biblical
In the tongue.
Boy/Male
Bengali, French, Hebrew, Hindu, Indian, Kannada, Marathi, Telugu
Lord Hanuman; Son of Wind
CENTERED TRIANGULAR-NUMBER
CENTERED TRIANGULAR-NUMBER
CENTERED TRIANGULAR-NUMBER
CENTERED TRIANGULAR-NUMBER
CENTERED TRIANGULAR-NUMBER
imp. & p. p.
of Centre
a.
Alt. of Self-centred
n. & v.
See Center.
v. t.
To make triangular, or three-cornered.
a.
Having three angles; triangular.
v. i.
Alt. of Centre
a.
Not centered; without a center.
a.
Seeming as if fettered, as the feet of certain animals which bend backward, and appear unfit for walking.
v. t.
Alt. of Centre
adv.
In a triangular manner; in the form of a triangle.
a.
Oblong or elongated, and having three lateral angles; as, a triangular seed, leaf, or stem.
a.
Having three angles; having the form of a triangle.
v. t.
To place or fix in the center or on a central point.
a.
Centered in itself, or in one's self.
a.
Affected with canker; as, a cankered mouth.
n. pl.
The triangular, or maioid, crabs. See Illust. under Maioid, and Illust. of Spider crab, under Spider.
v. t.
To form a recess or indentation for the reception of a center.
v. i.
To be placed in a center; to be central.
n.
A triangular chisel.