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 A015682 #11 Oct 23 2018 06:52:45
%S A015682 1,-3,15,-105,873,-8595,97335,-1233225,17298225,-266220675,4444840575,
%T A015682 -79989057225,1543271585625,-31735822993875,692766164665575,
%U A015682 -15995714865755625,389241925213766625,-9954282875453791875
%N A015682 Expansion of e.g.f. theta_3^(-3/2).
%D A015682 J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p. 102.
%H A015682 Seiichi Manyama, <a href="/A015682/b015682.txt">Table of n, a(n) for n = 0..438</a>
%t A015682 nmax = 25; CoefficientList[Series[EllipticTheta[3, 0, x]^(-3/2), {x, 0, nmax}], x] * Range[0, nmax]! (* _Vaclav Kotesovec_, Oct 23 2018 *)
%Y A015682 Cf. A015665.
%K A015682 sign
%O A015682 0,2
%A A015682 _N. J. A. Sloane_