a(n) = least k such that the remainder when 11^k is divided by k is n.
2, 3, 118, 7, 39, 155, 38, 9, 14, 18659, 13, 8153, 92, 1317, 106, 35, 26, 49, 34, 57, 68
1 seqfan posts
Tue Aug 11 01:35:14 CEST 2009 [seqfan] Re: Dead b-files for A127816 and others