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 A028443 #1 Dec 11 1999 03:00:00 %S A028443 1,8,49,288,841,9800 %N A028443 Erroneous version of A001108. %K A028443 dead %O A028443 0,2