A022053 Theta series of D_22 lattice.

1, 924, 117084, 4812192, 86075484, 815677016, 5012882336, 23460347328, 89096422492, 289559673084, 830202403800, 2153312518240, 5140361517984, 11444537517336, 24015334687168, 47873378766400, 91281903219804, 167369436673208, 296418599695548, 509007239863584

Offset

0,2

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

Mathematica

terms = 17; f[q_] = LatticeData["D22", "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 *)

Crossrefs

Sequence in context: A283577 A361608 A177304 * A107517 A140906 A179715

Adjacent sequences: A022050 A022051 A022052 * A022054 A022055 A022056

Keyword

nonn

Author

N. J. A. Sloane

Extensions

More terms from Seiichi Manyama, Oct 16 2018

Status

approved