%I #7 Mar 30 2012 16:48:52
%S 1,0,0,0,0,0,-3,0,0,0,-18,-18,24,0,-171,-162,153,252,-1704,-2106,1998,
%T 2586,-14364,-28098,19008,43020,-147024,-317304,125775,612954,
%U -1370868,-3909528,907209,7487136,-11849868,-46762686,252159
%N Low-temperature magnetization expansion for hexagonal lattice (Potts model, q=3).
%C The hexagonal lattice is the familiar 2-dimensional lattice in which each point has 6 neighbors. This is sometimes called the triangular lattice.
%H I. Jensen, <a href="/A057382/b057382.txt">Table of n, a(n) for n = 0..69</a> (from link below)
%H I. Jensen, <a href="http://www.ms.unimelb.edu.au/~iwan/potts/series/trp3mag.ser">More terms</a>
%H G. Nebe and N. J. A. Sloane, <a href="http://www.math.rwth-aachen.de/~Gabriele.Nebe/LATTICES/A2.html">Home page for hexagonal (or triangular) lattice A2</a>
%Y Cf. A057374-A057405.
%K sign
%O 0,7
%A _N. J. A. Sloane_, Aug 30 2000