polygonal number
21Figurate number — A figurate number is a number that can be represented as a regular and discrete geometric pattern (e.g. dots). If the pattern is polytopic, the figurate is labeled a polytopic number, and may be a polygonal number or a polyhedral number.The first …
22183 (number) — 183 is the natural number following 182 and preceding 184.183 is a semiprime (also called biprime, 2 almost prime, or pq number).183 is a central polygonal number, n^2 n + 1, where n=14. [http://www.research.att.com/ njas/sequences/A002061… …
23Hectagonal number — A hectagonal number is a type of polygonal number, which in turn is a type of figurate number. It is so named because it can be arranged to form a hectagon, which is a 100 sided polygon. If H n is the n th hectagonal number then H n=n(49n 48).… …
2446664 (number) — 46664 is the 44th record difference of the Mian Chowla sequence. It is a minimally polygonal number. In base 10, 46664 is a palindromic number and a Smith number.46664 (pronounced as four, double six, six four) was also the prison number for… …
25Bridge number — In a mathematical field of Knot theory, the Bridge number is an invariant of a knot. It is defined as the minimal number of bridges required in all the possible bridge representations of a knot. A bridge representation of a knot is a… …
26Pronic number — A pronic number, oblong number, rectangular number or heteromecic number, is a number which is the product of two consecutive integers, that is, n (n + 1). The n th pronic number is twice the n th triangular number and n more than… …
27Octahedral number — 146 magnetic balls, packed in the form of an octahedron In number theory, an octahedral number is a figurate number that represents the number of spheres in an octahedron formed from close packed spheres. The nth octahedral number On can be… …
28Stick number — In the mathematical theory of knots, the stick number is a knot invariant which intuitively gives the smallest number of straight sticks stuck end to end needed to form a knot. Specifically, given any knot K , the stick number of K is the… …
29Magic number (chemistry) — In case a gas condenses into clusters of atoms, the number of atoms in these clusters varies between a few and hundreds. However, there are peaks at specific sizes, usually one at lower and one at larger numbers. Often, specific numbers dominate …
30List of mathematics articles (P) — NOTOC P P = NP problem P adic analysis P adic number P adic order P compact group P group P² irreducible P Laplacian P matrix P rep P value P vector P y method Pacific Journal of Mathematics Package merge algorithm Packed storage matrix Packing… …
