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A029561
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Quasi-Carmichael numbers to base 2: squarefree composites n such that prime p|n ==> p-2|n-2.
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3
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1595, 6785, 53867, 67727, 102377, 296003, 740027, 961877, 998867, 1048817, 1270055, 1365377, 4086227, 7715567, 12266267, 15017921, 24960245, 33759467, 34918697, 36265385, 38342397, 41048777, 44535647, 48056087, 56264987, 58515347
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OFFSET
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1,1
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COMMENTS
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These are called 2-Korselt numbers by Beouallegue et al.
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LINKS
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MATHEMATICA
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qcm[n_, d_] := Block[{p, e}, {p, e} = Transpose@FactorInteger@n; Length[p] > 1 && Max[e] == 1 && ! MemberQ[p, d] && Max@ Mod[n-d, p-d] == 0]; Select[Range[10^5], qcm[#, 2] &] (* Giovanni Resta, May 21 2013 *)
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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