id:A029681 - OEIS Search Results

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Theta series of quadratic form with Gram matrix [ 2, 1, 0; 1, 2, 1; 0, 1, 3 ].

+0
2

1, 0, 6, 6, 0, 6, 6, 12, 6, 0, 6, 12, 6, 6, 24, 12, 0, 0, 18, 6, 6, 14, 12, 24, 6, 0, 18, 24, 12, 12, 12, 12, 6, 0, 12, 42, 0, 12, 30, 12, 6, 0, 42, 12, 12, 18, 12, 36, 6, 0, 30, 12, 6, 24, 24, 12, 24, 0, 24, 30, 12, 6, 36, 60, 0, 0, 12, 24, 0, 12, 42, 36, 18, 0, 24, 30, 6, 48, 36, 12, 6, 0, 24 (list; graph; listen)

	OFFSET	`0,3`
	COMMENT	`The Gram matrix [ 2, 1, 1; 1, 2, 1; 1, 1, 3 ] defines the same lattice.` `This is the trigonal R lattice (the classical holotype) of dimension 3.`
	LINKS	`John Cannon, Table of n, a(n) for n = 0..9999` `G. Nebe and N. J. A. Sloane, Home page for this lattice`
	EXAMPLE	`1 + 6q^2 + 6q^3 + 6q^5 + 6q^6 + 12q^7 + 6q^8 + 6q^10 + 12q^11 + 6*q^12 + ...`
	CROSSREFS	`Sequence in context: A005597 A081825 A028969 this_sequence A109917 A021942 A046620` `Adjacent sequences: A029678 A029679 A029680 this_sequence A029682 A029683 A029684`
	KEYWORD	`nonn`
	AUTHOR	`njas`

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Last modified December 4 12:27 EST 2008. Contains 151280 sequences.

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