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 A061089 #3 Jan 24 2006 03:00:00 %S A061089 1,2,4,8,512,68719476736,38685626227668133590597632 %N A061089 Duplicate of A067499. %K A061089 dead %O A061089 0,2