stirlingS2
stirlingS2(n, k)
he 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.
Try it yourself:
| $1 | stirlingS2(5, 3)
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