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%I #12 Oct 16 2018 08:40:20
%S 1,312,11466,116688,535704,1899664,5043376,12066912,24443978,48210760,
%T 83323344,145532816,227110416,363737712,531517376,800145632,
%U 1104376728,1594656544,2114015514,2931991920,3779027408,5091783840,6365016528,8409556064,10285042352,13266026280,15994749968
%N Theta series of D_13 lattice.
%D J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p. 118.
%H Seiichi Manyama, <a href="/A022044/b022044.txt">Table of n, a(n) for n = 0..10000</a>
%t terms = 20; f[q_] = LatticeData["D13", "ThetaSeriesFunction"][-I*Log[q]/Pi]; s = f[q] + O[q]^(2 terms); DeleteCases[CoefficientList[s, q], 0][[1 ;; terms]] (* _Jean-François Alcover_, Jul 06 2017 *)
%K nonn
%O 0,2
%A _N. J. A. Sloane_
%E More terms from _Seiichi Manyama_, Oct 16 2018