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 A086544 #4 May 11 2007 03:00:00 %S A086544 0,10,42,43,79,88,100,102,189,198,242,250,252,263,305,262,370,306,368 %N A086544 Duplicate of A031146. %K A086544 dead %O A086544 0,2