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A064255 Values of m such that N=(am+1)(bm+1)(cm+1) is a 3-Carmichael number (A087788), where a,b,c = 1,2,37. 1
498, 1608, 9156, 21588, 24696, 26250, 27360, 42456, 50670, 93738, 95736, 111720, 119046, 121266, 145020, 149238, 150570, 153456, 158340, 173658, 174990, 198300, 209178, 211176, 290208, 305748, 317070, 317958, 329058, 332610, 342378, 351258, 362580, 398988, 420966 (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

Amiram Eldar, Table of n, a(n) for n = 1..10000

MATHEMATICA

carmQ[n_] := CompositeQ[n] && Divisible[n - 1, CarmichaelLambda[n]]; Select[Range[10^5], AllTrue[(v = {1, 2, 37}*# + 1), PrimeQ] && carmQ[Times @@ v] &] (* Amiram Eldar, Oct 17 2019 *)

CROSSREFS

Cf. A087788.

Sequence in context: A145922 A145981 A210785 * A067917 A093249 A235753

Adjacent sequences:  A064252 A064253 A064254 * A064256 A064257 A064258

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 May 11 18:21 EDT 2021. Contains 343808 sequences. (Running on oeis4.)