

A004536


Theta series of 15dimensional unimodular lattice A15+.


0



1, 0, 240, 3640, 23790, 99456, 323680, 895680, 2139780, 4528640, 8971872, 16946280, 29822520, 49365120, 80003520, 127221568, 193388910, 282616320, 409634640, 590913960, 825575016, 1115613440
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OFFSET

0,3


REFERENCES

J. H. Conway, A. M. Odlyzko and N. J. A. Sloane, Extremal SelfDual Lattices Exist Only in Dimensions 18, 12, 14, 15, 23 and 24, Mathematika, 25 (1978), 3643.
J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", SpringerVerlag.


LINKS

Table of n, a(n) for n=0..21.
N. Heninger, E. M. Rains and N. J. A. Sloane, On the Integrality of nth Roots of Generating Functions, J. Combinatorial Theory, Series A, 113 (2006), 17321745.
G. Nebe and N. J. A. Sloane, Home page for this lattice


CROSSREFS

Sequence in context: A004009 A180277 A005950 * A234720 A145094 A239245
Adjacent sequences: A004533 A004534 A004535 * A004537 A004538 A004539


KEYWORD

nonn,easy,nice


AUTHOR

N. J. A. Sloane.


STATUS

approved



