id:A005134 - OEIS Search Results

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Number of n-dimensional unimodular lattice (or quadratic forms).
(Formerly M0219)

+0
5

1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 4, 5, 8, 9, 13, 16, 28, 40, 68, 117, 297, 665 (list; graph; listen)

	OFFSET	`0,9`
	REFERENCES	`J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p. 49.`
	CROSSREFS	`Cf. A054907-A054909, A054911.` `Adjacent sequences: A005131 A005132 A005133 this_sequence A005135 A005136 A005137` `Sequence in context: A103263 A029083 A005139 this_sequence A081651 A029193 A005858`
	KEYWORD	`nonn,nice,hard`
	AUTHOR	`njas`

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Last modified May 12 19:26 EDT 2008. Contains 139661 sequences.