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 A075474 #5 May 11 2007 03:00:00 %S A075474 1,65,2771,10920,158804,2413091,16636354,117650080 %N A075474 Duplicate of A069225. %K A075474 dead %O A075474 1,2