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Re:递推公式 a[i]=2(a[i-1]+a[i-2](i-1)) ?

Posted by 5l2 at 2009-05-19 15:23:02 on Problem 3734
In Reply To: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

> 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~
http://hi.baidu.com/5l2_/blog/item/946742f8c0b49107d8f9fd41.html
我的组合证明，还请教站内生成函数的式子

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