17 分钟（11+1，22+1，33+1，44+1，...)

来源: nyagela 于 2014-08-06 17:56:31 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

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17 分钟 （1*1+1，2*2+1，3*3+1，4*4+1，...)