17 分鍾（11+1，22+1，33+1，44+1，...)

來源: nyagela 於 2014-08-06 17:56:31 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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17 分鍾 （1*1+1，2*2+1，3*3+1，4*4+1，...)