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%I #11 Jun 12 2019 20:54:43
%S 1,182,6006,62244,290472,996996,2740738,6362148,13255242,25357514,
%T 45323278,76444368,123407466,191916088,287567280,421168748,601759340,
%U 836876040,1147564418,1547518336,2046646602,2679112800,3465409948,4415226816,5586066486
%N Theta series of A_13 lattice.
%D J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p. 110.
%t terms = 21; f[q_] = LatticeData["A13", "ThetaSeriesFunction"][-I*Log[q]/Pi]; s = f[q] + O[q]^(2 terms); Partition[CoefficientList[s, q] // Round, 2][[All, 1]][[1 ;; terms]] (* _Jean-François Alcover_, Jul 06 2017 *)
%K nonn
%O 0,2
%A _N. J. A. Sloane_.
%E More terms from Robert.Harley(AT)inria.fr, see A023902.
%E More terms from _Sean A. Irvine_, Jun 12 2019
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