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A029679 Theta series of quadratic form with Gram matrix [ 2, 0, 0; 0, 2, 1; 0, 1, 4 ]. 1
1, 4, 8, 8, 8, 16, 8, 2, 24, 20, 8, 16, 24, 16, 4, 16, 16, 40, 24, 8, 40, 0, 16, 32, 24, 28, 24, 32, 6, 32, 16, 16, 56, 48, 16, 0, 40, 32, 40, 16, 24, 56, 0, 16, 48, 48, 16, 48, 56, 4, 40, 16, 40, 64, 32, 16, 12, 64, 32, 40, 48, 16, 48, 10, 32, 80, 16, 32, 80, 32, 0, 48, 72, 56, 32, 40 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

This is the digonal C 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 + 4*q^2 + 8*q^4 + 8*q^6 + 8*q^8 + 16*q^10 + 8*q^12 + 2*q^14 + 24*q^16 + ...

CROSSREFS

Sequence in context: A201405 A040012 A054006 * A304651 A187768 A141284

Adjacent sequences:  A029676 A029677 A029678 * A029680 A029681 A029682

KEYWORD

nonn

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified September 17 12:45 EDT 2019. Contains 327131 sequences. (Running on oeis4.)