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A004536
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Theta series of 15-dimensional unimodular lattice A15+.
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0
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1, 0, 240, 3640, 23790, 99456, 323680, 895680, 2139780, 4528640, 8971872, 16946280, 29822520, 49365120, 80003520, 127221568, 193388910, 282616320, 409634640, 590913960, 825575016, 1115613440
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,3
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REFERENCES
| J. H. Conway, A. M. Odlyzko and N. J. A. Sloane, Extremal Self-Dual Lattices Exist Only in Dimensions 1-8, 12, 14, 15, 23 and 24, Mathematika, 25 (1978), 36-43.
J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag.
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LINKS
| N. Heninger, E. M. Rains and N. J. A. Sloane, On the Integrality of n-th Roots of Generating Functions, J. Combinatorial Theory, Series A, 113 (2006), 1732-1745.
G. Nebe and N. J. A. Sloane, Home page for this lattice
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CROSSREFS
| Sequence in context: A004009 A180277 A005950 * A145094 A008340 A187167
Adjacent sequences: A004533 A004534 A004535 * A004537 A004538 A004539
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KEYWORD
| nonn,easy,nice
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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