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 A090726 #2 Feb 24 2006 03:00:00 %S A090726 2,11,101,211,1021,1201,2011,2111,2221,10111,10211,12011,12101,12211 %N A090726 Duplicate of A036953. %K A090726 dead %O A090726 1,1