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 A068656 #5 May 11 2007 03:00:00 %S A068656 2,23,5711,2357,711131719,113127131137139149,29313741434753 %N A068656 Duplicate of A030997. %K A068656 dead %O A068656 1,1