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A054911 Number of n-dimensional odd unimodular lattice (or quadratic forms). 6
0, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 3, 3, 4, 5, 6, 9, 13, 16, 28, 40, 68, 117, 273, 665, 2566, 17059, 374062 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,10
REFERENCES
Gaëtan Chenevier, Unimodular hunting, Cogent Seminar, Jul 05 2021
J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p. 49.
LINKS
Gaëtan Chenevier, Unimodular hunting, Modular Forms Workshop, Oberwolfach online, Feb 2021.
Steven R. Finch, Minkowski-Siegel mass constants [Broken link]
CROSSREFS
Sequence in context: A018122 A074732 A089046 * A367215 A137267 A341451
KEYWORD
nonn,nice,hard
AUTHOR
N. J. A. Sloane, May 23 2000
STATUS
approved

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Last modified February 25 06:08 EST 2024. Contains 370310 sequences. (Running on oeis4.)