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6
votes
Expression for $\sum\limits_{k=0}^n \frac1{k+1}\left\{ n \atop k\right\}$?
combinatorics
stirling-numbers
asked Jul 7 '12 at 12:43
math.stackexchange.com
5
votes
Formula for $\sum_{k=0}^n S(n,k) k$, where $S(n,k)$ is a Stirling number of the second kind?
combinatorics
stirling-numbers
asked Mar 13 '11 at 19:30
math.stackexchange.com
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