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A064239
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Values of m such that N=(am+1)(bm+1)(cm+1) is a 3-Carmichael number (A087788), where a,b,c = 1,2,5.
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1
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6, 36, 306, 366, 546, 726, 966, 1296, 2556, 3066, 3696, 3876, 4506, 6036, 6216, 7686, 9126, 9276, 9906, 10596, 10656, 10836, 11286, 12516, 13146, 14196, 14406, 14736, 16266, 17106, 18216, 19416, 19476, 20406, 22146, 22806, 23766
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OFFSET
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1,1
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COMMENTS
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am+1, bm+1, cm+1 are primes and am | (N-1), bm | (N-1), cm |(N-1).
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REFERENCES
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Harvey Dubner (harvey(AT)dubner.com), personal communication, Jun 27 2001.
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LINKS
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MATHEMATICA
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CarmichaelNbrQ[n_] := ! PrimeQ@ n && Mod[n, CarmichaelLambda@ n] == 1; Select[ Range@ 23800, PrimeQ[# + 1] && PrimeQ[2# + 1] && PrimeQ[5# + 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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