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 A064244 #14 Oct 16 2019 11:28:05 %S A064244 36,156,306,546,576,606,726,1236,1296,1626,1656,2616,2706,3036,3186, %T A064244 3606,3696,4566,5166,5556,6216,6966,7296,7536,7866,8286,9156,10176, %U A064244 10266,10596,11496,14406,16086,16416,16746,18396,18636,18786,19476 %N A064244 Values of m such that N=(am+1)(bm+1)(cm+1) is a 3-Carmichael number (A087788), where a,b,c = 1,2,15. %C A064244 am+1, bm+1, cm+1 are primes and am | (N-1), bm | (N-1), cm |(N-1). %D A064244 Harvey Dubner (harvey(AT)dubner.com), personal communication, Jun 27 2001. %H A064244 Amiram Eldar, <a href="/A064244/b064244.txt">Table of n, a(n) for n = 1..10000</a> %t A064244 CarmichaelNbrQ[n_] := ! PrimeQ@ n && Mod[n, CarmichaelLambda@ n] == 1; Select[ Range@ 20000, PrimeQ[# + 1] && PrimeQ[2# + 1] && PrimeQ[15# + 1] && CarmichaelNbrQ[(# + 1)(2# + 1)(15# + 1)] &] (* _Robert G. Wilson v_, Aug 23 2012 *) %Y A064244 Cf. A087788. %K A064244 nonn %O A064244 1,1 %A A064244 _N. J. A. Sloane_, Sep 23 2001 %E A064244 Offset corrected by _Amiram Eldar_, Oct 16 2019