A029599 Theta series of quadratic form with Gram matrix [ 4, 1, 0; 1, 2, 1; 0, 1, 6 ].

1, 2, 4, 4, 8, 10, 4, 2, 12, 14, 0, 14, 8, 8, 16, 12, 16, 10, 12, 0, 20, 20, 8, 12, 16, 12, 16, 8, 8, 36, 12, 16, 28, 12, 8, 18, 32, 20, 0, 12, 8, 28, 12, 6, 40, 34, 16, 18, 16, 20, 28, 12, 16, 40, 24, 10, 40, 0, 12, 28, 32, 18, 12, 14, 28, 32, 20, 16, 28, 40, 16, 36, 36, 10, 28, 24, 2

Offset

0,2

Comments

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

Crossrefs

Sequence in context: A188824 A181212 A233394 * A213064 A076466 A073117

Adjacent sequences: A029596 A029597 A029598 * A029600 A029601 A029602

Keyword

nonn

Author

N. J. A. Sloane.

Status

approved