A057387 - OEIS

A057387

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

3, 0, 0, 0, 36, 72, -72, 0, 711, 1080, 144, -2556, 12852, 23004, -504, -21192, 122877, 525996, 69366, -531576, 1970154, 7833756, 6613164, -12953124, 24243261, 137623572, 130318974, -138059232, 115953372, 2338653528

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OFFSET

0,1

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..53 (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.

Sequence in context: A057382 A007270 A222896 * A109898 A223074 A192732

Adjacent sequences: A057384 A057385 A057386 * A057388 A057389 A057390

KEYWORD

sign

AUTHOR

N. J. A. Sloane, Aug 30 2000

STATUS

approved