A014453 - OEIS

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A014453

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

1, 8, 12, 6, 20, 24, 0, 24, 36, 8, 24, 24, 18, 48, 24, 0, 44, 48, 12, 24, 48, 24, 48, 48, 0, 56, 24, 6, 72, 72, 24, 24, 84, 0, 24, 48, 20, 96, 48, 24, 72, 48, 0, 72, 72, 24, 48, 48, 42, 56, 60, 0, 96, 120, 0, 48, 72, 48, 72, 24, 0, 96, 72, 24, 92, 96, 24, 72, 120, 0, 48, 48, 36, 96, 72 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,2`
	COMMENTS	`This is the hexagonal P 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 + 8q^2 + 12q^4 + 6q^6 + 20q^8 + 24q^10 + 24q^14 + 36q^16 + 8q^18 + ...`
	CROSSREFS	`Sequence in context: A072900 A203836 A166173 * A160862 A152077 A173461` `Adjacent sequences: A014450 A014451 A014452 * A014454 A014455 A014456`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`

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Last modified February 16 21:42 EST 2012. Contains 205977 sequences.