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 A065700 Values of m such that N = (am+1)(bm+1)(cm+1) is a 3-Carmichael number (A087788), where a,b,c = 1,2,65. 4

%I #7 Oct 17 2019 16:31:31

%S 876,1656,7506,9066,12966,33636,67956,74586,83556,89796,111636,126456,

%T 129186,143616,150246,154926,166626,184566,222786,241116,252036,

%U 252816,261786,271926,288306,303906,304686,319116,340956,344856,351096,357726,362406,363966,365526

%N Values of m such that N = (am+1)(bm+1)(cm+1) is a 3-Carmichael number (A087788), where a,b,c = 1,2,65.

%H Amiram Eldar, <a href="/A065700/b065700.txt">Table of n, a(n) for n = 1..10000</a>

%F am+1, bm+1, cm+1 are primes and am|(N-1), bm|(N-1), cm|(N-1).

%t carmQ[n_] := CompositeQ[n] && Divisible[n - 1, CarmichaelLambda[n]]; Select[Range[10^5], AllTrue[(v = {1, 2, 65}*# + 1), PrimeQ] && carmQ[Times @@ v] &] (* _Amiram Eldar_, Oct 17 2019 *)

%Y Cf. A064238-A064262, A065695-A065703, A087788.

%K nonn

%O 1,1

%A Harvey Dubner (harvey(AT)dubner.com), Nov 14 2001

%E More terms from _Amiram Eldar_, Oct 17 2019

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Last modified May 19 13:25 EDT 2024. Contains 372694 sequences. (Running on oeis4.)