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 A087174 #2 Jan 09 2009 03:00:00 %S A087174 1,2,3,5,7,11,5,11,5,7,7,11,101,5,11,11,11,11,7,19,11,167,251,7,89,29 %N A087174 Duplicate of A071963. %K A087174 dead %O A087174 1,2