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 A033751 #13 Oct 13 2018 09:17:23
%S A033751 1,2,0,2,6,0,0,4,0,2,0,0,6,6,4,0,10,12,0,4,8,4,4,0,0,14,8,2,12,12,0,4,
%T A033751 8,0,8,0,6,4,4,6,8,24,4,16,8,0,8,0,10,18,8,12,34,12,0,24,44,4,8,24,8,
%U A033751 28,12,4,46,48,4,28,36,0,16
%N A033751 Expansion of Product_{d | 39} theta_3(q^d).
%D A033751 J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p. 102, eq 9.
%H A033751 Seiichi Manyama, <a href="/A033751/b033751.txt">Table of n, a(n) for n = 0..10000</a>
%H A033751 Michael Gilleland, <a href="/selfsimilar.html">Some Self-Similar Integer Sequences</a>
%K A033751 nonn
%O A033751 0,2
%A A033751 _N. J. A. Sloane_