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A097980 Number of weakly eutactic lattices in dimension n. 0
1, 2, 5, 17, 127 (list; graph; refs; listen; history; text; internal format)
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

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Last modified January 24 01:05 EST 2020. Contains 331178 sequences. (Running on oeis4.)