Function stirlingS2

The Stirling numbers of the second kind, counts the number of ways to partition a set of n labelled objects into k nonempty unlabelled subsets. stirlingS2 only takes integer arguments. The following condition must be enforced: k <= n.

If n = k or k = 1, then s(n,k) = 1


stirlingS2(n, k)


Parameter Type Description
n Number | BigNumber Total number of objects in the set
k Number | BigNumber Number of objects in the subset


Type Description
Number | BigNumber S(n,k)


stirlingS2(5, 3); //returns 25