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 A084072 #4 Jan 04 2013 16:30:36 %S A084072 763,24467,193035,222300,244454 %N A084072 Erroneous version of A049534. %K A084072 dead %O A084072 1,1