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 A152137 #1 Jun 01 2010 03:00:00 %S A152137 2,0,4440084513,258,1703,930 %N A152137 Apparently an erroneous version of A073520. %C A152137 There is a slight possibility that the definition of this sequence is actually different from that of A073520. %K A152137 dead %O A152137 1,1