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A097584 Number of well-rounded minimal classes of lattices in dimension n. 1
1, 2, 5, 18, 136, 5634 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
REFERENCES
J. Martinet, Les réseaux 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
Christian Batut and Jacques Martinet, Lattices and spherical designs, 2005-2014. See pages 12-13.
CROSSREFS
Sequence in context: A006896 A125625 A281532 * A197855 A289126 A062097
KEYWORD
nonn,hard,more
AUTHOR
N. J. A. Sloane, Sep 22 2004
EXTENSIONS
a(6) added from Batut & Martinet by Andrey Zabolotskiy, Feb 20 2021
STATUS
approved

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Last modified February 29 17:30 EST 2024. Contains 370428 sequences. (Running on oeis4.)