n_compositions Function

public elemental function n_compositions(k, n) result(res)

Return the number of compositions for k summands and a sum of n

A composition is a solution to the integer equation $n = x_1 + ... + x_k$ with $x_i, n \in \mathbb{N}^0, k \in \mathbb{N}$.

Arguments

Type	Intent	Optional	Attributes		Name
integer,	intent(in)			::	k
integer,	intent(in)			::	n

Return Value integer(kind=int64)

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