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 A084533 #3 Jan 24 2006 03:00:00 %S A084533 1,1,3,1,5,5,1,7,14,7,1,9,27,30,9,1,11,44,77,55,11,1,13,65,156,182,91 %N A084533 Duplicate of A082985. %K A084533 dead %O A084533 0,3