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A064251
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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 = 1,2,29.
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1
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1608, 9090, 13440, 18660, 25620, 41280, 48588, 54678, 59028, 69990, 72948, 73470, 88260, 112620, 135588, 144288, 152640, 170388, 197358, 204318, 225720, 233550, 245208, 264870, 302628, 337080, 361440, 371358, 380058, 386148, 403548, 433650, 440958, 446178, 463230
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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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carmQ[n_] := CompositeQ[n] && Divisible[n - 1, CarmichaelLambda[n]]; Select[Range[10^5], AllTrue[(v = {1, 2, 29}*# + 1), PrimeQ] && carmQ[Times @@ v] &] (* Amiram Eldar, Oct 17 2019 *)
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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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Offset corrected and more terms added by Amiram Eldar, Oct 17 2019
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STATUS
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approved
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