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 A115001 #1 Feb 24 2006 03:00:00
%S A115001 1,2,3,5,7,10,13,18,22,29,35,43,51,63,72,87,99,115,130,152,168,193,
%T A115001 214,241,265,300,324,364,396,436,472,520,556,613,658,714,762,832,880,
%U A115001 957,1017,1089,1155,1247,1311,1409
%N A115001 Sum_{k=1}^n J_2(k)/24.
%C A115001 See A115000 for further information.
%K A115001 nonn
%O A115001 4,2
%A A115001 Franklin T. Adams-Watters, Dec 10 2005