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A064258 Values of m such that N=(am+1)(bm+1)(cm+1) is a 3-Carmichael number (A087788), where a,b,c = 1,2,43. 1
966, 12576, 36570, 37860, 71916, 78366, 103650, 126096, 132546, 242970, 279606, 316500, 387966, 392610, 404220, 407316, 418926, 459690, 498390, 500196, 523416, 524706, 554376, 604170, 707886, 729300, 749940, 755616, 769806, 840756, 897516, 903450, 974400, 1048446 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
am+1, bm+1, cm+1 are primes and am | (N-1), bm | (N-1), cm |(N-1).
REFERENCES
Harvey Dubner (harvey(AT)dubner.com), personal communication, Jun 27 2001.
LINKS
MATHEMATICA
carmQ[n_] := CompositeQ[n] && Divisible[n - 1, CarmichaelLambda[n]]; Select[Range[10^5], AllTrue[(v = {1, 2, 43}*# + 1), PrimeQ] && carmQ[Times @@ v] &] (* Amiram Eldar, Oct 17 2019 *)
CROSSREFS
Cf. A087788.
Sequence in context: A251232 A202049 A246477 * A142378 A035887 A255656
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Sep 23 2001
EXTENSIONS
Offset corrected and more terms added by Amiram Eldar, Oct 17 2019
STATUS
approved

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Last modified July 14 20:49 EDT 2024. Contains 374323 sequences. (Running on oeis4.)