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 A068874 #3 May 11 2007 03:00:00 %S A068874 1,25,49,81,100,169,196,289,361,529,529,900,900,1156,1444,1681,2025, %T A068874 2304 %N A068874 Duplicate of A018936. %K A068874 dead %O A068874 1,2