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 A180626 #17 Jul 12 2024 19:59:15
%S A180626 2,6,7,10,13,15,24,29,33,44,98,300,548,942,1099,1176,1632,1794,3676,
%T A180626 3768,4804,6499,8049,8164,8917,10270,11610,11959
%N A180626 Numbers k such that 9*k! + 1 is prime.
%C A180626 Tested to 4500. - _Robert G. Wilson v_, Sep 28 2010
%C A180626 a(22) > 5235. - _Jinyuan Wang_, Feb 05 2020
%H A180626 <a href="/index/Pri#primepop">Index entries for sequences related to numbers of primes of the form k*n!+-1</a>
%t A180626 fQ[n_] := PrimeQ[9 n! + 1]; k = 0; lst = {}; While[k < 1501, If[ fQ@k, AppendTo[lst, k]; Print@k]; k++ ]; lst
%o A180626 (PARI) is(k) = ispseudoprime(9*k!+1); \\ _Jinyuan Wang_, Feb 05 2020
%Y A180626 Cf. A002981, A051915, A076679, A076680, A076681, A076682, A076683, A178488, A126896.
%K A180626 nonn,more
%O A180626 1,1
%A A180626 _Robert G. Wilson v_, Sep 13 2010
%E A180626 a(17)-a(20) from _Robert G. Wilson v_, Sep 28 2010
%E A180626 a(21) from _Jinyuan Wang_, Feb 05 2020
%E A180626 a(22) from _Michael S. Branicky_, May 27 2023
%E A180626 a(23)-a(28) from _Michael S. Branicky_, Jul 12 2024