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A005140 Number of n-dimensional determinant 4 lattices.
(Formerly M0499)
0
0, 1, 1, 2, 3, 4, 5, 6, 7, 10, 13, 16, 22 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

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).

LINKS

Table of n, a(n) for n=0..12.

CROSSREFS

Sequence in context: A112881 A308019 A008814 * A176486 A017845 A211698

Adjacent sequences:  A005137 A005138 A005139 * A005141 A005142 A005143

KEYWORD

nonn

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified October 13 20:38 EDT 2019. Contains 327981 sequences. (Running on oeis4.)