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A054911
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Number of n-dimensional odd unimodular lattice (or quadratic forms).
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4
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0, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 3, 3, 4, 5, 6, 9, 13, 16, 28, 40, 68, 117, 273, 665
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,10
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REFERENCES
| J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p. 49.
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LINKS
| S. R. Finch, Minkowski-Siegel mass constants
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CROSSREFS
| Cf. A005134, A054907-A054909.
Sequence in context: A018122 A074732 A089046 * A137267 A123576 A094824
Adjacent sequences: A054908 A054909 A054910 * A054912 A054913 A054914
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KEYWORD
| nonn,nice,hard
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), May 23 2000
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