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 A169763 #7 Aug 22 2016 17:48:13 %S A169763 1,1,1,3,8,18,36,66,80 %N A169763 Duplicate of A004035. %K A169763 dead %O A169763 4,4