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A238835 Large-q series expansion for the surface free energy of the square-lattice zero-temperature Potts antiferromagnet, in terms of the variable z = 1/(q - 1). 2
1, 1, 0, -1, -1, 0, 1, -1, -8, -16, -16, -12, -41, -138, -210, 47, 849, 1471, -493, -8052, -19901, -19966, 37556, 223807, 508523, 321314, -2052462, -8417723, -13374892, 10841423, 112595914, 260687001, 70989018, -1341964856, -4108283969, -3304416038, 14960606999, 58237169596, 65268280922, -162368154719, -767619757924, -975329692910, 1872486336165, 9701425034093, 12262136381593, -24192583755347, -118764516172484 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,9

LINKS

Table of n, a(n) for n=0..46.

J. Salas and A. D. Sokal, Transfer Matrices and Partition-Function Zeros for Antiferromagnetic Potts Models. V. Further Results for the Square-Lattice Chromatic Polynomial, J. Stat. Phys. 135 (2009) 279-373, arXiv:0711.1738. Mentions this sequence.

CROSSREFS

Cf. A090673, A238836.

Sequence in context: A205869 A217178 A103699 * A040056 A242890 A224550

Adjacent sequences:  A238832 A238833 A238834 * A238836 A238837 A238838

KEYWORD

sign

AUTHOR

N. J. A. Sloane, Mar 14 2014

STATUS

approved

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Last modified January 27 12:02 EST 2022. Contains 350607 sequences. (Running on oeis4.)