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 A093867 #2 May 11 2007 03:00:00 %S A093867 4,9,25,25,49,49,121,121,121,121,169,169,289,289,289,289,361,361,529 %N A093867 Duplicate of A069549. %K A093867 dead %O A093867 1,1