A hexagonal number is a figurate number. The nth hexagonal number hn is the number of distinct dots in a pattern of dots consisting of the outlines of...

combinatorics, a centered hexagonal number, or centered hexagon number, is a centered figurate number that represents a hexagon with a dot in the center...

positive 9th powers 1035 = 45th triangular number, hexagonal number 1036 = central polygonal number 1037 = number in E-toothpick sequence 1038 = even integer...

Hexagonal crystal system Hexagonal number Hexagonal tiling: a regular tiling of hexagons in a plane Hexagram: six-sided star within a regular hexagon...

nth hexagonal number P(6,n) is also the (2n − 1)th triangular number T2n−1. We can find every hexagonal number by simply taking the odd-numbered triangular...

natural number following 299 and preceding 301. 300 is a composite number and the 24th triangular number. It is also a second hexagonal number. 315 = 32...

number and the nth (m + 1)-gonal number is the (n − 1)th triangular number. For example, the sixth heptagonal number (81) minus the sixth hexagonal number...

numbers to also be a centered hexagonal number. a centered nonagonal number. a centered cube number. a square pyramidal number, being the sum of the squares...

triangular number, a hexagonal number, sparsely totient number, Harshad number, balanced number, largely composite number 631 = Cuban prime number, Lucky...

abundant number; smallest odd primitive semiperfect number; Leyland number 946 = 2 × 11 × 43, sphenic number, 43rd triangular number, hexagonal number, happy...

pronic number, nontotient, Harshad number 703 = 19 × 37, the 37th triangular number, a hexagonal number, smallest number requiring 73 fifth powers for Waring...

Erdős–Woods number. It is also the 11th triangular number and the 6th hexagonal number. 66 (more specifically 66.667) megahertz (MHz) is a common divisor...

strictly adsurd number. A 130-30 fund or a ratio up to 150/50 is a type of collective investment vehicle MathWorld - Hexagonal Number Mackenzie, Dana...

tetrahedral number, Padovan number, Zuckerman number 817 = 19 × 43, sum of three consecutive primes (269 + 271 + 277), centered hexagonal number 818 = 2 ×...

a Størmer number. Twenty-eight is a harmonic divisor number, a happy number, the 7th triangular number, a hexagonal number, a Leyland number of the second...

number following 189 and preceding 191. 190 is a triangular number, a hexagonal number, and a centered nonagonal number, the fourth figurate number (after...

{\displaystyle 5^{2}+6^{2}} . It is also a centered decagonal number, and a centered hexagonal number. 61 is the fourth cuban prime of the form p = x 3 − y 3...

first number to be polygonal in 3 ways: it is the 5th triangular number, a hexagonal number, and pentadecagonal number. a centered tetrahedral number. the...

the ninth triangle number. Forty-five is also the fourth hexagonal number and the second hexadecagonal number, or 16-gonal number. It is also the second...

) and the 2 p − 1 {\displaystyle 2^{p-1}} -th hexagonal number. Furthermore, each even perfect number except for 6 is the 2 p + 1 3 {\displaystyle {\tfrac...

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....

are listed in the table below. Square lattice Hexagonal tiling Close-packing Centered hexagonal number Eisenstein integer Voronoi diagram Hermite constant...

numbers are closely related to centered hexagonal numbers. When the array corresponding to a centered hexagonal number is divided between its middle row and...

centered hexagonal number. Like all odd squares, it is a centered octagonal number. 169 is an odd-indexed Pell number, thus it is also a Markov number, appearing...

× 29, sphenic number, 29th triangular number, hexagonal number, self number, number of compositions of 16 into distinct parts The number of members in...

primes; thus, it is a strong prime. 127 is a centered hexagonal number. It is the seventh Motzkin number. 127 is a palindromic prime in nonary and binary....

triangular number. a hexagonal number. palindromic in bases 2 (10001100012) and 20 (18120). the first Carmichael number 562 = 2 × 281. It is: a Smith number. an...

is the third centered triangular number as well as the third centered hexagonal number. The 19th triangular number is 190, equivalently the sum of the...

triangular number. 120 is divisible by the first five triangular numbers and the first four tetrahedral numbers. It is the eighth hexagonal number. The 10th...

untouchable number, a triangular number, hexagonal number, 100-gonal number, and is polygonal in 6 other ways. 62,208 = 3-smooth number 62,210 = Markov number 62...