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 A048660 #18 Feb 16 2011 13:05:17 %S A048660 1,1,2,2,1,14,40,52,228,482 %N A048660 Erroneous version of A134997. %Y A048660 Cf. A038136, A048662, A134997. %K A048660 dead %O A048660 1,3