%I
%S 1,13,195,3315,62673,1299285,29228355,707636475,18316505025,
%T 504116658045,14685387955875,451033728019875,14555826008348625,
%U 492141539705941125,17387673626552904675,640456882350467056875
%N Expansion of e.g.f. theta_3^(13/2).
%D J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", SpringerVerlag, p. 102.
%H Seiichi Manyama, <a href="/A015690/b015690.txt">Table of n, a(n) for n = 0..425</a>
%t nmax = 25; CoefficientList[Series[EllipticTheta[3, 0, x]^(13/2), {x, 0, nmax}], x] * Range[0, nmax]! (* _Vaclav Kotesovec_, Oct 23 2018 *)
%K sign
%O 0,2
%A _N. J. A. Sloane_
