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A029680 Theta series of quadratic form with Gram matrix [ 4, 2, 2; 2, 4, 1; 2, 1, 6 ]. 1
1, 0, 6, 4, 4, 0, 14, 4, 6, 8, 2, 0, 20, 8, 12, 4, 16, 0, 26, 0, 0, 8, 8, 4, 42, 0, 20, 16, 12, 8, 0, 8, 14, 16, 20, 4, 36, 0, 20, 8, 6, 8, 52, 4, 8, 0, 12, 12, 52, 8, 6, 16, 24, 8, 46, 0, 20, 8, 20, 8, 16, 8, 20, 12, 28, 0, 64, 12, 16, 32, 0, 8, 58, 8, 20, 4, 16, 8, 60, 0, 0, 24, 44, 4, 40, 0, 20 (list; graph; refs; listen; history; internal format)
OFFSET

0,3

COMMENTS

This is the digonal F 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 + 6*q^4 + 4*q^6 + 4*q^8 + 14*q^12 + 4*q^14 + 6*q^16 + 8*q^18 + 2*q^20 + ...

CROSSREFS

Sequence in context: A099404 A095156 A198550 * A201285 A195359 A198840

Adjacent sequences:  A029677 A029678 A029679 * A029681 A029682 A029683

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

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Last modified February 16 06:27 EST 2012. Contains 205860 sequences.