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 A048624 #9 Oct 31 2018 16:28:37 %S A048624 2,5,12,29,70,169,408,985,2378,5741,13860,33461,80782,195025,470832, %T A048624 1136689 %N A048624 Essentially a duplicate of A000129. %K A048624 dead %O A048624 0,1