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Re:递推公式 a[i]=2(a[i-1]+a[i-2](i-1)) ?

Posted by phoenixwright at 2009-05-17 13:17:38 on Problem 3734 and last updated at 2009-05-17 13:31:11
In Reply To:Re:递推公式 a[i]=2*(a[i-1]+a[i-2]*(i-1)) ? Posted by:PeacefulBY at 2009-05-17 13:06:53

> 2^(n-1)*(1+2^(n-1))
话说偶用生成函数推出这个式子来的，，纯代数思想，不过这个可有组合数学的解释??，，~0~

Followed by:

Re:递推公式 a[i]=2*(a[i-1]+a[i-2]*(i-1)) ? (48) 19880901 2009-05-17 19:15:47
- Re:递推公式 a[i]=2*(a[i-1]+a[i-2]*(i-1)) ? (417) demo 2009-05-18 21:21:57
  - 感谢及赞 (447) longpo 2009-05-19 05:22:32
Re:递推公式 a[i]=2*(a[i-1]+a[i-2]*(i-1)) ? (133) 5l2 2009-05-19 15:23:02

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