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 A068699 #4 May 11 2007 03:00:00 %S A068699 43,109,2221,2423,3433,4241,5857,7069,7877,8887,10099,102101,108107 %N A068699 Duplicate of A052089. %K A068699 dead %O A068699 1,1