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 A065697 Values of m such that N = (am+1)(bm+1)(cm+1) is a Carmichael number where a,b,c = 1,2,57. 3

%I

%S 198,996,2706,9090,13536,16728,25620,33486,34056,35310,41010,53550,

%T 58566,60960,61986,63240,72816,72930,74526,75780,77490,80340,83760,

%U 96756,97326,100746,103140,111918,125028,125370,128676,129360,136656

%N Values of m such that N = (am+1)(bm+1)(cm+1) is a Carmichael number where a,b,c = 1,2,57.

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

%t CarmichaelNbrQ[n_] := ! PrimeQ@n && Mod[n, CarmichaelLambda@n] == 1; Select[ Range@140000, PrimeQ[# +1] && PrimeQ[2# +1] && PrimeQ[57# +1] && CarmichaelNbrQ[(# +1) (2# +1) (57# +1)] &] (* _Robert G. Wilson v_, Jul 31 2017 *)

%Y Cf. A064238-A064262, A065695-A065703

%K nonn

%O 1,1

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

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Last modified July 18 19:00 EDT 2019. Contains 325144 sequences. (Running on oeis4.)