A022050 Theta series of D_19 lattice.

1, 684, 62054, 1759704, 21210156, 140116184, 658369608, 2449182384, 7597766246, 20748447108, 50601708504, 114223115480, 238352317656, 472600643976, 883678139136, 1594639240368, 2749536787500, 4620722631088, 7482364853310, 11894205734280, 18321074279384

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..1000

Programs

Mathematica

terms = 17; f[q_] = LatticeData["D19", "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