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 A081269 #3 May 11 2007 03:00:00 %S A081269 3,14,34,63,101,148,204,269,343,426,518,619,729,848,976,1113,1259,1414 %N A081269 Duplicate of A064226. %K A081269 dead %O A081269 0,1