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 A048262 #7 Mar 30 2012 18:34:53 %S A048262 1,2,4,5,6,8,9,12,13,15,16,17,20,24,25,27,28,32,35,36,39,48,51,55 %N A048262 Numbers that aren't the sum of distinct primes of the form 4n+3. %D A048262 David Wells, Penguin Dictionary of Curious and Interesting Numbers, Entry 55. %Y A048262 Cf. A048263. %K A048262 fini,full,nonn %O A048262 1,2 %A A048262 _Jud McCranie_