This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A064243 #14 Oct 16 2019 11:28:02 %S A064243 96,1656,2280,5556,6960,7506,8286,12420,12966,15540,17490,23496,26226, %T A064243 28410,32076,33870,42060,53526,57036,61560,67956,73416,89796,104850, %U A064243 107580,108516,122166,124350,126690,132150,143616,148920 %N A064243 Values of m such that N=(am+1)(bm+1)(cm+1) is a 3-Carmichael number (A087788), where a,b,c = 1,2,13. %C A064243 am+1, bm+1, cm+1 are primes and am | (N-1), bm | (N-1), cm |(N-1). %D A064243 Harvey Dubner (harvey(AT)dubner.com), personal communication, Jun 27 2001. %H A064243 Amiram Eldar, <a href="/A064243/b064243.txt">Table of n, a(n) for n = 1..10000</a> %t A064243 CarmichaelNbrQ[n_] := ! PrimeQ@ n && Mod[n, CarmichaelLambda@ n] == 1; Select[ Range@ 150000, PrimeQ[# + 1] && PrimeQ[2# + 1] && PrimeQ[13# + 1] && CarmichaelNbrQ[(# + 1)(2# + 1)(13# + 1)] &] (* _Robert G. Wilson v_, Aug 23 2012 *) %Y A064243 Cf. A087788. %K A064243 nonn %O A064243 1,1 %A A064243 _N. J. A. Sloane_, Sep 23 2001 %E A064243 Offset corrected by _Amiram Eldar_, Oct 16 2019