A057388 Low-temperature specific heat expansion for hexagonal lattice (Potts model, q=4).

108, 0, 0, 0, 900, 2178, -3672, 0, 14112, 27000, -18432, -114444, 290628, 467856, -354600, -1479114, 1768536, 12073896, -5861808, -29193750, 22900176, 165214728, 64153152, -654007014, 163350540, 2795893038

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..54 (from link below)
• I. Jensen, More terms
• G. Nebe and N. J. A. Sloane, Home page for hexagonal (or triangular) lattice A2
• Index entries for sequences related to specific heat

Crossrefs

Cf. A057374-A057405.