A005140 - OEIS

A005140

Number of n-dimensional determinant 4 lattices.
(Formerly M0499)

0, 1, 1, 2, 3, 4, 5, 6, 7, 10, 13, 16, 22

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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

CROSSREFS

KEYWORD

nonn

AUTHOR

STATUS

approved