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Re:简单公式

Posted by lddlinan at 2021-03-09 20:49:56 on Problem 3875
In Reply To:简单公式 Posted by:lddlinan at 2021-03-09 17:46:21 
> 如果v>0 f(0)=0 否则 f(0)=1
> f(1)=1
> f(n) = (C(2**n, n-1)-f(n-2)*(2**n-(n-2)))/n

手残，更正一下
f(m) = (C(2**n, m-1)-f(m-2)*(2**n-(m-2)))/m
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