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 A093666 #7 Mar 30 2012 17:31:00 %S A093666 1,2,82,3362,137842,188354,5651522,7722514,13232914,231712402, %T A093666 316623074,432649138,542549474,1196468642,2650762258,9500208482, %U A093666 12981546034,17738614658,22244528434,30396003458,49055214322,108681252578,389508547762,532243387394,727283200978,912025665794,993795069986 %N A093666 Numbers n such that n | 3^n^2 + 1. %C A093666 If n is a term and p is its odd prime divisor, then p*n is also a term. In particular, the sequence contains 2*41^k and 2*41*2297^k for all k>=1. %t A093666 Select[ Range[ 250000000], PowerMod[3, #^2, # ] +1 == # & ] %Y A093666 Cf. A015949, A092408, A093546. %K A093666 nonn %O A093666 1,2 %A A093666 _Robert G. Wilson v_, Apr 02 2004 %E A093666 Terms a(11) onward from _Max Alekseyev_, Feb 13 2012