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 A007205 #4 Dec 11 1999 03:00:00 %S A007205 1,241,9361,120161 %N A007205 Erroneous version of A008349. %K A007205 dead %O A007205 0,2