回复：回复：设 S（n+1）=n*(S(n)+S(n-1))

我用spreadsheet试过，收敛很快。

所有跟帖： 

• This Q ,in fact,, is not good, If s!(1),s(2)>0,I think I'm right -jinjing- ♀ (214 bytes) () 10/10/2011 postreply 12:50:10

• 回复：This Q ,in fact,, is not good, If s!(1),s(2)>0,I think I'm ri -贫论员- ♂ (51 bytes) () 10/10/2011 postreply 13:00:14

• Ha,thank you, if the answer is Tra....number,The PS is wrong I'' -jinjing- ♀ (30 bytes) () 10/10/2011 postreply 13:18:29

• 老人顽固啊... -jinjing- ♀ (0 bytes) () 10/12/2011 postreply 09:48:35

• Give an example: S(n) = 1/2(S(n-1) + S(n-2)), S(1) = S(2) = 1. -wxcfan123- ♂ (90 bytes) () 10/10/2011 postreply 14:40:29

• Very good, but the type is different. -jinjing- ♀ (116 bytes) () 10/10/2011 postreply 15:03:14

• 我就是太强调2,糊涂判定发散... -jinjing- ♀ (0 bytes) () 10/12/2011 postreply 10:05:45

• 糊涂到顶,给出了处处收敛的条件,..说不... -jinjing- ♀ (0 bytes) () 10/12/2011 postreply 09:37:27