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A029677 Theta series of quadratic form with Gram matrix [ 4, 1, 0; 1, 4, 2; 0, 2, 6 ]. 1
1, 0, 4, 6, 2, 6, 2, 6, 10, 2, 4, 10, 12, 6, 6, 6, 6, 10, 10, 10, 16, 6, 2, 12, 12, 4, 8, 22, 12, 12, 8, 8, 22, 10, 4, 22, 10, 0, 16, 10, 12, 18, 10, 14, 20, 16, 8, 26, 20, 6, 16, 14, 16, 10, 14, 10, 16, 10, 12, 28, 12, 8, 28, 28, 10, 16, 10, 16, 36, 8, 8, 18, 30, 18, 0, 26, 20, 22, 12, 6, 36 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

This is the triclinic 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 + 4*q^4 + 6*q^6 + 2*q^8 + 6*q^10 + 2*q^12 + 6*q^14 + 10*q^16 + 2*q^18 + 4*q^20 + ...

CROSSREFS

Sequence in context: A160502 A010669 A225092 * A045867 A236189 A347910

Adjacent sequences:  A029674 A029675 A029676 * A029678 A029679 A029680

KEYWORD

nonn

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified October 26 05:58 EDT 2021. Contains 348257 sequences. (Running on oeis4.)