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 A033957 #5 Jan 09 2009 03:00:00 %S A033957 3,4,6,6,6,6,6,10,8,8,10,6,6,10,12,8,8,10,6,8,10,10,14,12,6,6,6,6,18, %T A033957 18 %N A033957 Duplicate of A031131. %K A033957 dead %O A033957 1,1