StirlingS2
StirlingS2[n, m] gives the Stirling number of the second kind .
Integer mathematical function (see Section A.3.10). gives the number of ways of partitioning a set of elements into non-empty subsets. See The Mathematica Book: Section 3.2.5. See also: StirlingS1.
Further Examples
StirlingS2[n, m] gives the Stirling number of the second kind 
. 
gives the number of ways of partitioning a set of 
elements into 
non-empty subsets. 
