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Search: id:A054911
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| A054911 |
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Number of n-dimensional odd unimodular lattice (or quadratic forms). |
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+0
5
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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; listen)
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OFFSET
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0,10
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REFERENCES
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J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p. 49.
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LINKS
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S. R. Finch, Minkowski-Siegel mass constants
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CROSSREFS
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Cf. A005134, A054907-A054909.
Sequence in context: A018122 A074732 A089046 this_sequence A137267 A123576 A094824
Adjacent sequences: A054908 A054909 A054910 this_sequence A054912 A054913 A054914
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KEYWORD
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nonn,nice,hard
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com), May 23 2000
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