A022062 Theta series of D_31 lattice.

1, 1860, 503502, 47229864, 2046701220, 47775740520, 671636175480, 6309132101904, 43733123309262, 241275541236780, 1111479953165352, 4426891212365160, 15633379938039144, 49899492947343864, 146147632445771200, 397406328481552528, 1013148957319630500, 2440161908107807952

Offset: 0

Author

N. J. A. Sloane

Keywords

• nonn

References

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

Links

• Seiichi Manyama, Table of n, a(n) for n = 0..10000

Programs

Mathematica

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-François Alcover, Jul 06 2017 *)

Extensions

More terms from Seiichi Manyama, Oct 16 2018