StirlingS1
StirlingS1[n, m] gives the Stirling number of the first kind .
Integer mathematical function (see Section A.3.10). gives the number of permutations of elements which contain exactly cycles. See The Mathematica Book: Section 3.2.5. See also: StirlingS2.
Further Examples
StirlingS1[n, m] gives the Stirling number of the first kind 
. 
gives the number of permutations of 
elements which contain exactly 
cycles. 
