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 A073444 #6 Nov 28 2024 21:21:22 %S A073444 2,19,3628789,479001587 %N A073444 Primes of the form n! - n - 1. %C A073444 a(5), a 730-digit number, has been certified prime with Primo. %F A073444 a(k) = A073443(k)! - A073443(k) - 1. %e A073444 a(1) = 4! - 4 - 1 = 19, a prime, so 19 is in this sequence (4 = A073443(1)). %o A073444 (PARI) for(n=3,2000, p=n!-n-1; if(isprime(p),print1(p,","))) %Y A073444 Cf. A073443 (corresponding n). %K A073444 nonn %O A073444 1,1 %A A073444 _Rick L. Shepherd_, Jul 31 2002