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 A070019 #5 May 11 2007 03:00:00 %S A070019 1,4,56,7192,7232,7912,10792,17272,30592,114256,2154584,3428368, %T A070019 44375136 %N A070019 Duplicate of A056075. %K A070019 dead %O A070019 1,2