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 A075265 #4 May 11 2007 03:00:00 %S A075265 1,2,24,48,5760,11520,2903040,5806080,1393459200,2786918400 %N A075265 Duplicate of A053657. %K A075265 dead %O A075265 1,2