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 A086656 #3 May 11 2007 03:00:00 %S A086656 1,5,265,2367,237493,2576561,338350897,616410400171,7811559753873 %N A086656 Duplicate of A034602. %K A086656 dead %O A086656 5,2