id:A006776 - OEIS Search Results

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Number of n-step spirals on hexagonal lattice.
(Formerly M2738)

+0
1

1, 3, 8, 20, 47, 106, 230, 479, 973, 1924, 3712, 7021, 13034, 23780, 42732, 75703, 132360, 228664, 390611, 660296, 1105321, 1833358, 3014694, 4917036, 7958127, 12786252 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`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. Szekeres and A. J. Guttmann, Spiral self-avoiding walks on the triangular lattice, J. Phys. A 20 (1987), 481-493.`
	LINKS	`G. Nebe and N. J. A. Sloane, Home page for hexagonal (or triangular) lattice A2`
	CROSSREFS	`Adjacent sequences: A006773 A006774 A006775 this_sequence A006777 A006778 A006779` `Sequence in context: A101533 A138803 A048492 this_sequence A050231 A136305 A026712`
	KEYWORD	`nonn`
	AUTHOR	`njas`

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Last modified October 7 14:39 EDT 2008. Contains 144666 sequences.

AT&T Labs Research