A057385 Low-temperature partition function expansion for hexagonal lattice (Potts model, q=3).

1, 0, 0, 0, 0, 0, 2, 0, 0, 0, 6, 6, -8, 0, 36, 36, -42, -60, 272, 330, -402, -554, 1758, 3564, -3320, -7056, 14616, 33426, -21498, -83640, 111856, 354612, -158802, -884208, 758088, 3744582, -734260, -9805608, 4839270, 38734736, 2364180

Offset: 0

Author

N. J. A. Sloane, Aug 30 2000

Keywords

• sign

Comments

The hexagonal lattice is the familiar 2-dimensional lattice in which each point has 6 neighbors. This is sometimes called the triangular lattice.

Links

• I. Jensen, Table of n, a(n) for n = 0..69 (from link below)
• I. Jensen, More terms
• G. Nebe and N. J. A. Sloane, Home page for hexagonal (or triangular) lattice A2

Crossrefs

Cf. A057374-A057405.