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 A180627 #12 Jul 05 2024 02:02:11
%S A180627 0,1,2,5,8,42,318,326,1054,2987,11243
%N A180627 Numbers k such that 6*k! - 1 is prime.
%C A180627 Tested to 4400. - _Robert G. Wilson v_, Sep 28 2010
%C A180627 a(11) > 6300. - _Jinyuan Wang_, Feb 04 2020
%H A180627 <a href="/index/Pri#primepop">Index entries for sequences related to numbers of primes of the form k*n!+-1</a>
%t A180627 fQ[n_] := PrimeQ[6 n! - 1]; k = 0; lst = {}; While[k < 1501, If[ fQ@k, AppendTo[lst, k]; Print@k]; k++ ]; lst
%o A180627 (PARI) is(k) = ispseudoprime(6*k!-1); \\ _Jinyuan Wang_, Feb 04 2020
%Y A180627 Cf. A002982, A076133, A076134, A099350, A099351, A180628, A180630, A180630, A180631.
%K A180627 nonn,more
%O A180627 1,3
%A A180627 _Robert G. Wilson v_, Sep 13 2010
%E A180627 a(10) from _Robert G. Wilson v_, Sep 28 2010
%E A180627 a(11) from _Michael S. Branicky_, Jul 04 2024