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A093666
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Numbers n such that n | 3^n^2 + 1.
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1
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1, 2, 82, 3362, 137842, 188354, 5651522, 7722514, 13232914, 231712402, 316623074, 432649138, 542549474, 1196468642, 2650762258, 9500208482, 12981546034, 17738614658, 22244528434, 30396003458, 49055214322, 108681252578, 389508547762, 532243387394, 727283200978, 912025665794, 993795069986
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OFFSET
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1,2
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COMMENTS
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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.
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LINKS
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MATHEMATICA
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Select[ Range[ 250000000], PowerMod[3, #^2, # ] +1 == # & ]
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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