Can some one please show me how to prove directly that $S(n, n - 1) = \binom n 2$ I know that $S(n,n)=1$
Prove directly that $S(n, n - 1) = \binom{n}{2}$ (Striling numbers of 2nd kind)
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combinatorics
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0Your question is not clear (Make sure you are using proper notations) – 2012-02-22