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 A071200 #3 Oct 15 2013 22:31:22 %S A071200 2,3,7,11,13,17,19,29,37,43,47,53,61,67,73,79,89,103,107,113,137,139, %T A071200 149,151,157,163,167,179,181,191,193,197,227,229,233,239,241,257,271, %U A071200 277,281,283,293,307,313,317,337,347,353,359,367,373,379,383,389,397 %N A071200 Primes which do not appear in A071196. %Y A071200 Cf. A071200. %K A071200 nonn %O A071200 1,1 %A A071200 _Labos Elemer_, May 16 2002