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 A151342 #12 Jan 06 2015 05:51:04 %S A151342 1,1,4,25,196,1764,17424,184041,2044900,23639044 %N A151342 Duplicate of A001246. %K A151342 dead %O A151342 0,3