A057383 Low-temperature susceptibility expansion for hexagonal lattice (Potts model, q=3).

2, 0, 0, 0, 24, 24, -20, 0, 366, 324, -42, -312, 4788, 6036, -1356, -1820, 54036, 99252, -3024, -53352, 686988, 1382336, 285870, -926172, 7988984, 19975392, 6245886, -12161464, 89970804, 273568968, 134393334, -181279824

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..62 (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.