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A005140
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Number of n-dimensional determinant 4 lattices.
(Formerly M0499)
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0
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0, 1, 1, 2, 3, 4, 5, 6, 7, 10, 13, 16, 22
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,4
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REFERENCES
| J. H. Conway and N. J. A. Sloane, Low-dimensional lattices I: quadratic forms of small determinant, Proc. Royal Soc. London, A 418 (1988), 17-41.
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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CROSSREFS
| Sequence in context: A164947 A112881 A008814 * A176486 A017845 A092026
Adjacent sequences: A005137 A005138 A005139 * A005141 A005142 A005143
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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