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 A365074 #29 Jun 16 2025 23:48:54 %S A365074 4,6,14,126,184,634,1354,1550,6710 %N A365074 Numbers k such that k! - k^2 - 1 is prime. %t A365074 Select[Range[4, 1600, 2], PrimeQ[#! - #^2 - 1] &] (* _Amiram Eldar_, Sep 12 2023 *) %o A365074 (Python) %o A365074 from gmpy2 import * %o A365074 print([k for k in range(0,2000) if is_prime((fac(k)- k*k - 1))]) %Y A365074 Cf. A073443. %K A365074 nonn,hard,more %O A365074 1,1 %A A365074 _Darío Clavijo_, Sep 12 2023 %E A365074 a(9) from _Michael S. Branicky_, Sep 14 2023