id:A008656 - OEIS Search Results

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Theta series of direct sum of 5 copies of hexagonal lattice.

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1, 30, 360, 2190, 7230, 14976, 32760, 72060, 92520, 177150, 280800, 351360, 527790, 856860, 864720, 1362816, 1850430, 2004480, 2657160, 3909660, 3609216, 5260380, 6588000, 6716160, 8419320 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`The hexagonal lattice is the familiar 2-dimensional lattice in which each point has 6 neighbors. This is sometimes called the triangular lattice.`
	REFERENCES	`J. H. Conway and N. J. A. Sloane, Sphere Packings, Lattices and Groups, Springer-Verlag, p. 110.`
	LINKS	`G. Nebe and N. J. A. Sloane, Home page for hexagonal (or triangular) lattice A2`
	CROSSREFS	`Sequence in context: A125418 A107916 A091775 this_sequence A086864 A138441 A058837` `Adjacent sequences: A008653 A008654 A008655 this_sequence A008657 A008658 A008659`
	KEYWORD	`nonn,easy`
	AUTHOR	`njas`

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Last modified August 29 17:54 EDT 2008. Contains 143238 sequences.

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