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A065696 Numbers m such that N = (am+1)(bm+1)(cm+1) is a 3-Carmichael number (A087788), where a,b,c = 1,2,55. 4
3876, 7506, 8166, 16746, 20706, 23676, 24336, 40506, 42156, 68226, 69876, 79776, 95286, 123996, 139176, 149076, 166236, 177786, 183066, 187686, 203856, 210126, 213096, 214086, 216396, 221676, 232566, 265566, 307146, 310116, 321006, 326946 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
FORMULA
am+1, bm+1, cm+1 are primes and am|(N-1), bm|(N-1), cm|(N-1).
MATHEMATICA
CarmichaelNbrQ[n_] := ! PrimeQ@ n && Mod[n, CarmichaelLambda@ n] == 1; Select[ Range@ 350000, PrimeQ[# + 1] && PrimeQ[2# + 1] && PrimeQ[55# + 1] && CarmichaelNbrQ[(# + 1)(2# + 1)(55# + 1)] &] (* Robert G. Wilson v, Aug 23 2012 *)
CROSSREFS
Sequence in context: A264206 A035781 A108005 * A246735 A283026 A014891
KEYWORD
nonn
AUTHOR
Harvey Dubner (harvey(AT)dubner.com), Nov 14 2001
STATUS
approved

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Last modified June 13 22:21 EDT 2024. Contains 373391 sequences. (Running on oeis4.)