A022058 Theta series of D_27 lattice.

1, 1404, 280854, 19014840, 581257404, 9436118328, 93086496360, 638406025200, 3387901252374, 14765641285044, 55108831380408, 181434042582840, 538265644820280, 1464212332875816, 3696677780664960, 8759016189382896, 19620550996489404, 41872709357187696

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 = 15; f[q_] = LatticeData["D27", "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