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%I #7 Mar 30 2012 17:31:00
%S 1,2,82,3362,137842,188354,5651522,7722514,13232914,231712402,
%T 316623074,432649138,542549474,1196468642,2650762258,9500208482,
%U 12981546034,17738614658,22244528434,30396003458,49055214322,108681252578,389508547762,532243387394,727283200978,912025665794,993795069986
%N Numbers n such that n | 3^n^2 + 1.
%C 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 Select[ Range[ 250000000], PowerMod[3, #^2, # ] +1 == # & ]
%Y Cf. A015949, A092408, A093546.
%K nonn
%O 1,2
%A _Robert G. Wilson v_, Apr 02 2004
%E Terms a(11) onward from _Max Alekseyev_, Feb 13 2012
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