A022056 Theta series of D_25 lattice.

1, 1200, 202450, 11389600, 285385200, 3779134240, 30885301600, 181284196800, 842726826450, 3262594952400, 10968671291040, 32802221530400, 89267475949600, 223991253535200, 525491835433600, 1161295395893440, 2440508069871600, 4898380398568000, 9456583413620850, 17601674014456800

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["D25", "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