A014452 - OEIS

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A014452

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

1, 2, 6, 12, 2, 0, 18, 12, 6, 14, 12, 12, 12, 0, 12, 36, 2, 12, 42, 12, 0, 0, 24, 24, 18, 14, 12, 48, 12, 0, 48, 12, 6, 36, 12, 24, 14, 0, 24, 48, 12, 12, 72, 36, 12, 0, 24, 24, 12, 14, 30, 72, 0, 0, 54, 24, 12, 48, 36, 12, 36, 0, 36, 84, 2, 24, 48, 36, 12, 0, 24, 24, 42, 24, 36, 60, 12 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,2`
	COMMENTS	`This is the hexagonal P lattice (the classical holotype) of dimension 3.`
	LINKS	`John Cannon, Table of n, a(n) for n = 0..10000` `G. Nebe and N. J. A. Sloane, Home page for this lattice`
	EXAMPLE	`1 + 2q + 6q^2 + 12q^3 + 2q^4 + 18q^6 + 12q^7 + 6q^8 + 14q^9 + 12*q^10 + ...`
	CROSSREFS	`Sequence in context: A156065 A130274 A057294 * A188894 A054579 A205103` `Adjacent sequences: A014449 A014450 A014451 * A014453 A014454 A014455`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`

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Last modified February 17 12:38 EST 2012. Contains 206021 sequences.