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
Syntax
stirlingS2(n, k)
Parameters
Parameter | Type | Description |
---|---|---|
n |
Number | BigNumber | Total number of objects in the set |
k |
Number | BigNumber | Number of objects in the subset |
Returns
Type | Description |
---|---|
Number | BigNumber | S(n,k) |
Examples
stirlingS2(5, 3); //returns 25