id:A028998 - OEIS Search Results

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Theta series of quadratic form with Gram matrix [ 4, 2, 2, 1; 2, 4, 1, 2; 2, 1, 6, 3; 1, 2, 3, 6 ].

+0
2

1, 0, 6, 12, 12, 0, 30, 12, 18, 36, 6, 24, 72, 24, 36, 12, 48, 24, 114, 24, 12, 84, 48, 36, 162, 0, 60, 120, 84, 48, 30, 48, 102, 120, 84, 12, 264, 72, 96, 144, 18, 48, 252, 60, 120, 36, 108, 60, 324, 96, 6, 192, 144, 96, 354, 24, 180, 216, 132, 96, 72, 96, 144, 300, 180, 24, 384 (list; graph; listen)

	OFFSET	`0,3`
	COMMENT	`This is the 4-dimensional lattice E(15).`
	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^4 + 12q^6 + 12q^8 + 30q^12 + 12q^14 + 18q^16 + 36q^18 + 6q^20 + ...`
	CROSSREFS	`Sequence in context: A092461 A102809 A060479 this_sequence A040030 A135462 A061928` `Adjacent sequences: A028995 A028996 A028997 this_sequence A028999 A029000 A029001`
	KEYWORD	`nonn`
	AUTHOR	`njas`

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.

AT&T Labs Research