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A023904 Theta series of A_13 lattice. 0

%I

%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-Fran├žois 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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Last modified January 27 18:40 EST 2022. Contains 350611 sequences. (Running on oeis4.)