A125561 Theta series of 5-dimensional lattice A_5^{+2}.

1, 0, 0, 20, 30, 0, 0, 60, 90, 0, 0, 180, 140, 0, 0, 132, 270, 0, 0, 420, 360, 0, 0, 360, 330, 0, 0, 560, 660, 0, 0, 540, 810, 0, 0, 1080, 570, 0, 0, 480, 1020, 0, 0, 1500, 1260, 0, 0, 1080, 1100, 0, 0, 1320, 1560, 0, 0, 1320, 1620, 0, 0, 2340, 1452, 0, 0, 1140, 2190, 0, 0, 2940

Offset

0,4

References

J. H. Conway and N. J. A. Sloane, Low-Dimensional Lattices I: Quadratic Forms of Small Determinant, Proc. Royal Soc. London, Series A, 418 (1988), 17-41.

J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p. 110.

Links

John Cannon, Table of n, a(n) for n = 0..10000

Example

1 + 20*q^3 + 30*q^4 + 60*q^7 + 90*q^8 + 180*q^11 + 140*q^12 + 132*q^15 + ...

Crossrefs

Sequence in context: A303080 A113621 A166676 * A171908 A338158 A107714

Adjacent sequences: A125558 A125559 A125560 * A125562 A125563 A125564

Keyword

nonn

Author

N. J. A. Sloane, Jan 31 2007

Status

approved