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 A057130 #6 Sep 08 2013 02:55:33
%S A057130 5,55,935,21505,623645,25569445,1201763915,63693487495,3757915762205,
%T A057130 266812019116555,22145397586674065,1970940385213991785,
%U A057130 199064978906613170285,21299952743007609220495,2406894659959859841915935,315303200454741639290987485
%N A057130 Product of first n primes of form 6k-1.
%F A057130 a(n) = a(n-1)*A007528(n) = (A057131(n)+1)/6.
%e A057130 a(3) = 5*11*17 = 935.
%e A057130 a(4) = 21505 = 5 * 11 * 17 * 23.
%o A057130 (PARI) lista(nn) = {pp = 1; for (n = 1, nn, p = prime(n); if (Mod(p, 6) == -1, pp *= p; print1(pp, ", ")););} \\ _Michel Marcus_, Sep 08 2013
%Y A057130 Cf. A000040, A002110, A002476, A006278, A007528, A074040, A078586, A121940.
%Y A057130 Cf. A008543, A057131.
%K A057130 nonn,easy
%O A057130 1,1
%A A057130 _Henry Bottomley_, Aug 11 2000
%E A057130 More terms from Larry Reeves (larryr(AT)acm.org), Oct 06 2000
%E A057130 More terms from _Michel Marcus_, Sep 08 2013