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 A180630 #16 Nov 03 2024 02:13:25
%S A180630 2,3,12,15,16,25,30,38,59,82,114,168,172,175,213,229,251,302,311,554,
%T A180630 2538,3050,3363,12316
%N A180630 Numbers k such that 9*k! - 1 is prime.
%C A180630 a(22) > 2575. - _Jinyuan Wang_, Feb 03 2020
%H A180630 <a href="/index/Pri#primepop">Index entries for sequences related to numbers of primes of the form k*n!+-1</a>
%t A180630 fQ[n_] := PrimeQ[9 n! - 1]; k = 0; lst = {}; While[k < 1501, If[ fQ@k, AppendTo[lst, k]; Print@k]; k++ ]; lst
%o A180630 (PARI) is(k) = ispseudoprime(9*k!-1); \\ _Jinyuan Wang_, Feb 03 2020
%Y A180630 Cf. A002982, A076133, A076134, A099350, A099351, A180627, A180628, A180629, A180631.
%K A180630 nonn,more
%O A180630 1,1
%A A180630 _Robert G. Wilson v_, Sep 13 2010
%E A180630 a(21) from _Jinyuan Wang_, Feb 03 2020
%E A180630 a(22)-a(23) from _Michael S. Branicky_, Apr 25 2023
%E A180630 a(24) from _Michael S. Branicky_, Nov 02 2024