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嗯……第二类Stirling数是有个求和式展开的……

Posted by frkstyc at 2007-11-18 14:22:58
In Reply To:sum{(-1)^(m-k)*c(m,k)*k*(k-1)^(n-1)} (1<=k<=m) Posted by:windy7926778 at 2007-11-18 14:20:26


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