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 A084343 #3 Nov 10 2007 03:00:00 %S A084343 1,2,6,6,30,30,420,420,420,420,4620,4620,60060,60060,60060,60060 %N A084343 Duplicate of A083907. %K A084343 dead %O A084343 1,2