No solution

来源: 于 2014-10-17 14:31:15 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

n has to be odd. If k>=3, mod 8 on both sides, we have 5 = 1 (mod 8), which is wrong.

k=1 or 2 leads no solution