A005399 - OEIS

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A005399

Susceptibility series for hexagonal lattice.
(Formerly M4256)

6, 48, 408, 3600, 42336, 781728, 13646016, 90893568, -1798204416 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,1`
	COMMENTS	`The hexagonal lattice is the familiar 2-dimensional lattice in which each point has 6 neighbors. This is sometimes called the triangular lattice.`
	REFERENCES	`G. A. Baker et al., On the two-dimensional, spin-1/2 Heisenberg ferromagnetic models, Phys. Lett., 25A (1967), 207-209.` `N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).`
	LINKS	`G. Nebe and N. J. A. Sloane, Home page for hexagonal (or triangular) lattice A2`
	CROSSREFS	`Sequence in context: A155130 A083233 A002918 * A037184 A179075 A175916` `Adjacent sequences: A005396 A005397 A005398 * A005400 A005401 A005402`
	KEYWORD	`sign`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`

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Last modified February 15 19:15 EST 2012. Contains 205852 sequences.