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Re:请问公式是怎么推的阿？

Posted by huatao at 2008-03-23 10:27:06 on Problem 1737
In Reply To:请问公式是怎么推的阿？ Posted by:gamme at 2006-10-07 08:38:13 
m = C(n,2); p = pow(2,m);
f(n) = p - (C(n,1)f(1)+C(n,2)f(2)+...+C(n,n-1)f(n-1));
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