It is the coefficient of x^92 of

来源: 于 2007-12-18 19:35:20 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

(1+x+x^2+...)(1+x^5+x^10+...)...(1+x^50+...).

You can try small examples to verify.