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Re:找到了递推关系的规律,但找不到合理的解释,谁来解释一下?

Posted by s_1 at 2005-11-09 12:01:00 on Problem 2680
In Reply To:找到了递推关系的规律,但找不到合理的解释,谁来解释一下? Posted by:yiyiyi4321 at 2005-11-05 10:29:52 
> 当N为奇数a[N]=a[N-1]*2-1;
> 当N为偶数a[N]=a[N-1]*2+1;
> 

我推的是F[N]=F[N-2]+2^(N-3)
应该好理解点吧，把前面几个写出来就能看出来
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