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A022062 Theta series of D_31 lattice. 2

%I #12 Oct 16 2018 07:56:11

%S 1,1860,503502,47229864,2046701220,47775740520,671636175480,

%T 6309132101904,43733123309262,241275541236780,1111479953165352,

%U 4426891212365160,15633379938039144,49899492947343864,146147632445771200,397406328481552528,1013148957319630500,2440161908107807952

%N Theta series of D_31 lattice.

%D J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p. 118.

%H Seiichi Manyama, <a href="/A022062/b022062.txt">Table of n, a(n) for n = 0..10000</a>

%t terms = 14; f[q_] = LatticeData["D31", "ThetaSeriesFunction"][-I*Log[q]/Pi]; s = f[q] + O[q]^(2 terms); DeleteCases[CoefficientList[s, q], 0][[1 ;; terms]] (* _Jean-Fran├žois Alcover_, Jul 06 2017 *)

%K nonn

%O 0,2

%A _N. J. A. Sloane_

%E More terms from _Seiichi Manyama_, Oct 16 2018

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Last modified July 19 22:34 EDT 2024. Contains 374441 sequences. (Running on oeis4.)