A029677 Theta series of quadratic form with Gram matrix [ 4, 1, 0; 1, 4, 2; 0, 2, 6 ].

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

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