A097980 Number of weakly eutactic lattices in dimension n.

1, 2, 5, 17, 127

Offset

1,2

References

J. Martinet, Les reseaux parfaits des espaces Euclidiens, Masson, Paris, 1996.

J. Martinet, Perfect Lattices in Euclidean Spaces, Springer-Verlag, NY, 2003.

G. Nebe, Review of J. Martinet, Perfect Lattices in Euclidean Spaces, Bull. Amer. Math. Soc., 41 (No. 4, 2004), 529-533.

Links

Table of n, a(n) for n=1..5.

Crossrefs

Sequence in context: A161609 A228238 A174168 * A210525 A074046 A123374

Adjacent sequences: A097977 A097978 A097979 * A097981 A097982 A097983

Keyword

nonn,hard

Author

N. J. A. Sloane, Sep 22 2004

Status

approved