%I #15 Apr 15 2018 09:16:50
%S 1,96,3552,62592,528864,2191680,8951424,23321856,67105248,134971872,
%T 319970880,550300032,1147717248,1771816512,3371135232,4826361600,
%U 8594190816,11587029696,19592103264
%N Theta series of direct sum of 4 copies of D_4 lattice.
%D J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p. 119.
%H Seiichi Manyama, <a href="/A008660/b008660.txt">Table of n, a(n) for n = 0..10000</a>
%H <a href="/index/Da#D4">Index entries for sequences related to D_4 lattice</a>
%t terms = 19; s = (1/2 (EllipticTheta[3, 0, q]^4 + EllipticTheta[4, 0, q]^4) )^4 + O[q]^(2 terms); CoefficientList[s, q^2] (* _Jean-François Alcover_, Jul 08 2017 *)
%K nonn,easy
%O 0,2
%A _N. J. A. Sloane_