A029682 - OEIS

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A029682

Theta series of quadratic form with Gram matrix [ 2, 1, 0; 1, 2, 1; 0, 1, 4 ].

1, 6, 6, 12, 18, 0, 12, 24, 18, 18, 6, 24, 24, 24, 12, 8, 42, 12, 30, 48, 0, 24, 36, 24, 36, 6, 12, 48, 60, 24, 0, 48, 42, 24, 36, 12, 54, 48, 12, 48, 18, 24, 24, 84, 48, 0, 60, 24, 48, 42, 6, 72, 72, 24, 48, 0, 36, 48, 60, 48, 20, 48, 24, 72, 90, 12, 24, 108, 36, 24, 0, 48, 90, 60 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,2`
	COMMENTS	`This is the trigonal R lattice (the even holotype) of dimension 3.`
	LINKS	`John Cannon, Table of n, a(n) for n = 0..5000` `G. Nebe and N. J. A. Sloane, Home page for this lattice`
	EXAMPLE	`1 + 6q^2 + 6q^4 + 12q^6 + 18q^8 + 12q^12 + 24q^14 + 18q^16 + 18q^18 + ...`
	CROSSREFS	`Sequence in context: A112437 A122223 A046625 * A014201 A022089 A110357` `Adjacent sequences: A029679 A029680 A029681 * A029683 A029684 A029685`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`

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Last modified February 15 07:42 EST 2012. Contains 205717 sequences.