Category
page 1Factorial and binomial topics
factorial
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|+ Selected factorials; values in scientific notation are rounded
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! n
! n!
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| 4 || 24
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| 5 || 120
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| 6 || 720
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binomial theorem
algebraic expansion of powers of a binomial

Pascal's triangle
triangular array of the binomial coefficients in mathematics
permutation
thumb|120 px|According to the first meaning of permutation, each of the six rows is a different permutation of three distinct balls|alt=The six different possible ways to order three balls of different colors: (red, green, blue), (red, blue, green), (green, red, blue), (green, blue, red), (blue, red, green), and (blue, green, red).
In mathematics, a permutation of a set can mean one of two different things:
an arrangement of its members in a sequence or linear order, or
the act or process of changing the linear order of an ordered set.
binomial distribution
probability distribution
Poisson distribution
discrete probability distribution
triangular number
figurate number
binomial
polynomial with two terms
binomial coefficient
family of positive integers that occur as coefficients in the binomial theorem
Catalan number
recursive integer sequence
Wilson's theorem
necessary and sufficient condition for a number to be prime
Sierpiński triangle
fractal composed of triangles
gamma distribution
probability distribution
hypergeometric distribution
discrete probability distribution

primorial
In mathematics, and more particularly in number theory, primorial, denoted by "p_{n}\#", is a function from natural numbers to natural numbers similar to the factorial function, but rather than successively multiplying positive integers, the function only multiplies prime numbers.
negative binomial distribution
probability distribution
beta distribution
distributions defined on [0, 1] in terms of two positive parameters
multiset
In mathematics, a multiset (or bag, or mset) is a modification of the concept of a set that, unlike a set, allows for multiple instances for each of its elements. The number of instances given for each element is called the multiplicity of that element in the multiset. As a consequence, an infinite number of multisets exist that contain only elements and , but vary in the multiplicities of their elements:
The set contains only elements and , each having multiplicity 1 when is seen as a multiset.
In the multiset , the element has multiplicity 2, and has multiplicity 1.
In the multiset , and
finite difference
discrete analog of a derivative
multinomial theorem
theorem about how to expand a power of a sum in terms of powers of the terms in that sum. It is the generalization of the binomial theorem to polynomials
multinomial distribution
generalization of the binomial distribution
factorial prime
prime numbers of the form n!±1
Vandermonde's identity
mathematical theorem of binomial coefficients
Stirling number
important functions in combinatorics
binomial series
Taylor series
Wilson prime
Type of prime number
Brocard's problem
the Diophantine problem of finding an integer, whose factorial plus one is a perfect square
double factorial
product of all the integers from 1 up to the integral input of the function that have the same parity as this input
hypergeometric function
special function defined by a hypergeometric series
Newton polynomial
mathematical expression
Legendre's formula
number theory expression
Hermite interpolation
method for polynomial interpolation over a set of points and corresponding derivatives
Stirling number of the second kind
number of ways to partition a set of n objects into k non-empty subsets
binomial transform
transformation of a mathematical sequence
Wolstenholme's theorem
theorem
falling and rising factorial
mathematical functions
Eulerian number
number of permutations of the numbers from 1 to n in which m elements are greater than the previous element
Stirling number of the first kind
number of permutations of n elements with k disjoint cycles
Pillai prime
type of prime number

factorial number system
mixed radix numeral system adapted to numbering permutations; represents a number as a×0! + b×1! + c×2! + ⋯
Pascal's pyramid
three-dimensional arrangement of the trinomial numbers, which are the coefficients of the trinomial expansion and the trinomial distribution
Abel's binomial theorem
theorem
Faà di Bruno's formula
theorem
central binomial coefficient
sequence of numbers ((2n) choose (n))
Narayana number
numbers giving a solution to several counting problems in combinatorics
Singmaster's conjecture
conjecture in combinatorial number theory
hyperfactorial
In mathematics, and more specifically number theory, the hyperfactorial of a positive integer n is the product of the numbers of the form x^x from 1^1 to
generalized hypergeometric function
family of power series in mathematics
superfactorial
In mathematics, and more specifically number theory, the superfactorial of a positive integer n is the product of the first n factorials. They are a special case of the Jordan–Pólya numbers, which are products of arbitrary collections of factorials.
factorial moment
expectation or average of the falling factorial of a random variable
Gaussian binomial coefficient
family of polynomials
Poisson binomial distribution
The discrete probability distribution of a sum of independent Bernoulli trials that are not necessarily identically distributed
exponential factorial
recursive mathematical formula
Lah number
mathematical sequence
Trinomial expansion
formula in mathematics
Sperner's theorem
theorem on the largest antichain of sets
Kempner function
function that maps an integer 𝑛 to the smallest integer whose factorial is a multiple of 𝑛
Alternating factorial
mathematical concept
hockey-stick identity
recurrence relations of binomial coefficients in Pascal's triangle
Genocchi number
mathematics concept