This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A178202 #13 Mar 31 2012 10:22:16
%S A178202 1,2,3,19,37,76,7,17,9,22,31,15,29,77,309,34,7194589,26,23,341,21,55,
%T A178202 799,1658,476983,46,27,427,629,52,142241,138,68889,136,1897,129,30935,
%U A178202 44,19303,1642,34943,43,8858994648397,102,117,436,7715,86,49
%N A178202 Smallest k such that 41^k mod k = n.
%t A178202 aa = {}; Do[k = 1; While[PowerMod[41, k, k] != n, k++ ]; Print[{n, k}]; AppendTo[aa, k], {n, 1, 50}]; aa
%Y A178202 Cf. A036236, A078457, A119678, A119679, A119714-A119716, A127817-A127821, A128154-A128372, A178194-A178202
%K A178202 nonn
%O A178202 0,2
%A A178202 _Artur Jasinski_, May 23 2010
%E A178202 a(0)=1 prepended and a(42) added by _Max Alekseyev_, Feb 04 2012