Is this the correct question?

回答: 我女儿的题目15少2011-05-27 09:22:06

In this case, f(n)=n+1005.5 works.

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N-->N, from natural to natural -15少- 给 15少 发送悄悄话 15少 的博客首页 (0 bytes) () 05/29/2011 postreply 01:24:18

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