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 A073827 #5 Mar 30 2012 17:36:39 %S A073827 0,1,2,3,7,14 %N A073827 Numbers n such that 1 + 0!*1!*2!*...*n! is prime. %C A073827 Any additional terms are greater than 115 with the next prime having 9744 or more digits. %o A073827 (PARI) pr=1; for(n=0,115, pr=pr*n!; if(isprime(pr+1), print1(n,","))) %Y A073827 Cf. A073828 (corresponding primes), A000178 (superfactorials), A019515. %K A073827 nonn %O A073827 1,3 %A A073827 _Rick L. Shepherd_, Aug 16 2002