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 A096649 #4 Oct 01 2013 17:58:02 %S A096649 3,23,199,2297,30013,510481,9699667,223092827,6469693189,200560490057, %T A096649 7420738134751,304250263527163,13082761331669941,614889782588491343, %U A096649 32589158477190044657,117288381359406970983181 %N A096649 First occurrence where n# - p is a prime for primes p = 3,5,... %F A096649 n# is n primorial = product of primes 2*3*5*...*p<=n %e A096649 5# = 2*3*5 = 30. 30-3 = 27,30-5=25,30-7 = 23 prime %o A096649 (PARI) pr=1;forprime(x=2,n,pr*=x;forprime(m=2,n, y=pr-m;if(isprime(y),print1(y",");break))) %K A096649 nonn %O A096649 2,1 %A A096649 _Cino Hilliard_, Aug 22 2004