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 A035880 #4 May 11 2007 03:00:00 %S A035880 1,0,128,0,2944,1024,31616,15360,199424,101376,877696,439296 %N A035880 Duplicate of A010369. %K A035880 dead %O A035880 0,3