a(n) = least k such that the remainder when 17^k is divided by k is n.
2, 3, 7, 13, 142, 11, 25, 9, 10, 299, 57, 203, 46, 69, 274, 613024059983, 19, 7099195
1 seqfan posts
Tue Aug 11 01:35:14 CEST 2009 [seqfan] Re: Dead b-files for A127816 and others