A155309 - OEIS

A155309

Number of ways to place zero or more nonadjacent 0,0 1,0 2,1 3,1 4,2 5,2 polyhexes in any orientation on a planar nXnXn triangular grid.

1, 7, 19, 52, 196, 938, 5406, 33082, 270615, 2652565, 30092725, 403696211, 6603268906 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`5,2`
	LINKS	`Table of n, a(n) for n=5..17.`
	EXAMPLE	`Maximal 13 X 13 X 13 example` `...............0` `..............0.0` `.............0.0.1` `............0.1.1.0` `...........1.1.0.0.1` `..........1.0.0.0.1.0` `.........0.0.1.1.0.1.0` `........0.1.1.0.0.1.0.1` `.......1.1.0.0.0.0.1.0.1` `......0.0.0.1.0.0.1.0.1.0` `.....1.1.0.0.1.1.0.0.0.1.0` `....0.0.1.1.0.0.1.1.0.1.0.0` `...0.0.0.0.1.1.0.0.1.0.1.0.0`
	CROSSREFS	`Sequence in context: A155347 A155385 A155345 * A155419 A155246 A155414` `Adjacent sequences: A155306 A155307 A155308 * A155310 A155311 A155312`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin Jan 22 2009`
	STATUS	`approved`

Last modified June 28 19:10 EDT 2022. Contains 354907 sequences. (Running on oeis4.)