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 A074175 #3 May 11 2007 03:00:00 %S A074175 44,18,172,171,45,12,45,12,236,18,52,63,50,261,524,12,28,45,44,637,404 %N A074175 Duplicate of A074174. %K A074175 dead %O A074175 1,1