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 A048056 #4 May 11 2007 03:00:00 %S A048056 1,1,9,25,1225,3969,53361,184041,41409225,147744025,2133423721 %N A048056 Duplicate of A038534. %K A048056 dead %O A048056 0,3