Category: Integers A triangular number is the sum of the n natural numbers from 1 to n. ... A safe prime is a prime number of the form 2p + 1, where p is also a prime. ... The magic constant of a magic square, an n-by-n matrix, is defined such that the sum of any row, column or main diagonal yields the same result, denoted M2(n). ... It has been suggested that Date magic square be merged into this article or section. ... One possible solution The eight queens puzzle is the problem of putting eight chess queens on an 8×8 chessboard such that none of them is able to capture any other using the standard chess queens moves. ... A balanced prime is a prime number that is equal to the arithmetic mean of the nearest prime above and below. ... A prime number p is called a Sophie Germain prime if 2p + 1 is also prime. ... The term weird number also refers to a phenomenon in twos complement arithmetic. ... A super-Poulet number is a Poulet number whose every divisor d divides 2d - 2. ... A pyramid with side length 5 contains 35 spheres. ... In mathematics, a power of two is any of the nonnegative integer powers of the number two; in other words, two times itself a certain number of times. ... In arithmetic and algebra, the cube of a number n is its third power &#8212; the result of multiplying it by itself two times: n3 = n × n × n. ... 4104 is the second positive integer which can be expressed as the sum of two positive cubes in two different ways. ... In mathematics, the n-th taxicab number, typically denoted Ta(n) or Taxicab(n), is defined as the smallest number which can be expressed as a sum of two positive cubes in n distinct ways, up to order of summands. ... The Bell numbers, named in honor of Eric Temple Bell, are a sequence of integers arising in combinatorics that begins thus (sequence A000110 in OEIS): In general, Bn is the number of partitions of a set of size n. ... 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 dot in successive heptagonal layers. ... A tiling with squares whose sides are successive Fibonacci numbers in length A Fibonacci spiral, created by drawing arcs connecting the opposite corners of squares in the Fibonacci tiling shown above – see golden spiral. ... A Markov number or Markoff number is an integer x, y or z that is part of a solution to the Markov Diophantine equation The first few Markov numbers are 1, 2, 5, 13, 29, 34, 89, 169, 194, 233, 433, 610, 985, 1325, ... (sequence A002559 in OEIS) appearing in... In recreational mathematics, a repunit is a number like 11, 111, or 1111 that contains only the digit 1. ... First-class cricket matches are those between international teams or the highest standard of domestic teams in which teams have two innings each. ... Wilfred Rhodes (born October 29, 1877, North Moor, Kirkheaton, near Huddersfield, Yorkshire; died July 8, 1973, Branksome Park, Poole) was one of the greatest cricketers of the twentieth century. ... In number theory, a branch of mathematics, a highly cototient number k is an integer that has more solutions to the equation x - &#966;(x) = k, where &#966; is Eulers totient function, than any integer below it, with the exception of 1. ... A nonagonal number or enneagonal number is a figurate number that represents a nonagon. ... A pentagonal pyramidal number is a number equal to the sum of the first few pentagonal numbers. ... In mathematics, a meander or closed meander is a self-avoiding closed curve which intersects a line a number of times. ... A cuban prime is a prime number that is a solution to one of two different specific equations involving third powers of x and y. ... A Kynéa number (pronounced: Ka-Nay), named after Kynéa R. Griffith, is an integer of the form . ... A 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 dot in successive octagonal layers. ... A Leyland number is an integer of the form xy + yx with 1 < x ≤ y. ... A pyramidal number, or square pyramidal number, is a figurate number that represents a pyramid with a base and four sides. ... In number theory, a perfect totient number is an integer that is equal to the sum of its iterated totients. ... A super-Poulet number is a Poulet number whose every divisor d divides 2d - 2. ... Comet Hale-Bopp (formally designated C/1995 O1) was probably the most widely observed comet of the twentieth century, and one of the brightest seen for many decades. ... The 4400 is a science fiction television program produced by the USA Network and Sky One. ... An alternating factorial is the sum of the first n factorials with the odd-indexed factorials multiplied by −1 if n is even, and the even-indexed factorials multiplied by −1 if n is odd, resulting in an alternation of signs of the summands (or alternation of addition and subtraction... A cuban prime is a prime number that is a solution to one of two different specific equations involving third powers of x and y. ... A pyramid with side length 5 contains 35 spheres. ... A Zeisel number is a square-free integer k with at least three prime factors which fall into the pattern where a and b are fixed constants and x is the index number of each prime factor in the factorization, sorted from lowest to highest. ... An octahedral number is a figurate number that represents an octahedron, or two pyramids placed together, one upside-down underneath the other. ... In mathematics, a Woodall number is a natural number of the form n · 2n âˆ’ 1 (written Wn). ... A check or cheque (borrowed from Persian &#1670;&#1603; Chek) is a document instructing a financial institution to pay a specific amount of a specific currency from a specific demand account held in the maker/depositors name with that institution. ... Host Bob Barker and a contestant in front of Check Game Check Game is a pricing game on the American television game show The Price Is Right. ... Motto: (Out Of Many, One) (traditional) In God We Trust (1956 to date) Anthem: The Star-Spangled Banner Capital Washington D.C. Largest city New York City None at federal level (English de facto) Government Federal constitutional republic  - President George Walker Bush (R)  - Vice President Dick Cheney (R) Independence from... See TV (disambiguation) for other uses and Television (band) for the rock band European networks National In much of Europe television broadcasting has historically been state dominated, rather than commercially organised, although commercial stations have grown in number recently. ... “Quiz show” redirects here. ... The Price Is Rights US 35th season logo. ... The magic constant of a magic square, an n-by-n matrix, is defined such that the sum of any row, column or main diagonal yields the same result, denoted M2(n). ... It has been suggested that Date magic square be merged into this article or section. ... One possible solution The eight queens puzzle is the problem of putting eight chess queens on an 8×8 chessboard such that none of them is able to capture any other using the standard chess queens moves. ... A super-Poulet number is a Poulet number whose every divisor d divides 2d - 2. ... In mathematics, a Keith number or repfigit number is an integer that appears as a term in a linear recurrence relation with initial terms based off its own digits. ... A cuban prime is a prime number that is a solution to one of two different specific equations involving third powers of x and y. ... Seventeen or Bust is a distributed computing project to solve the last seventeen cases in the Sierpinski problem. ... In number theory, a Sierpinski number is an odd natural number k such that integers of the form k2n + 1 are composite (i. ... A pentagonal pyramidal number is a number equal to the sum of the first few pentagonal numbers. ... In combinatorial mathematics, the Catalan numbers form a sequence of natural numbers that occur in various counting problems, often involving recursively defined objects. ... In mathematics, a Kaprekar number is a number that, in a given base, when squared, can be split into two numbers with the same number of digits as the original number which add up to the original number again. ... A pyramidal number, or square pyramidal number, is a figurate number that represents a pyramid with a base and four sides. ... In mathematics, a square number, sometimes also called a perfect square, is an integer that can be written as the square of some other integer; in other words, it is the product of some integer with itself. ... Look up one in Wiktionary, the free dictionary. ... In arithmetic and algebra, the cube of a number n is its third power &#8212; the result of multiplying it by itself two times: n3 = n × n × n. ... A centered cube number is a centered figurate number that represents a cube. ... In mathematics, a Kaprekar number is a number that, in a given base, when squared, can be split into two numbers with the same number of digits as the original number which add up to the original number again. ... A pyramid with side length 5 contains 35 spheres. ... A Smith number is a number which in a given base, the sum of its digits is equal to the sum of the digits in its factorization. ...