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Search: id:A005140
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| A005140 |
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Number of n-dimensional determinant 4 lattices.
(Formerly M0499)
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+0
1
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| 0, 1, 1, 2, 3, 4, 5, 6, 7, 10, 13, 16, 22
(list; graph; listen)
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OFFSET
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0,4
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REFERENCES
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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
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Sequence in context: A164947 A112881 A008814 this_sequence A017845 A092026 A084749
Adjacent sequences: A005137 A005138 A005139 this_sequence A005141 A005142 A005143
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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