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A155365 Number of ways to place zero or more nonadjacent 1,1 2,1 2,2 3,1 4,1 5,0 5,1 6,1 polyhexes in any orientation on a planar nXnXn triangular grid. 0
1, 7, 19, 37, 176, 778, 2821, 12886, 88605, 593766, 4348497, 42965155, 470395612 (list; graph; refs; listen; history; text; internal format)
OFFSET

6,2

LINKS

Table of n, a(n) for n=6..18.

EXAMPLE

Maximal 10 X 10 X 10 example

............0

...........1.0

..........1.1.0

.........0.0.1.0

........1.1.0.1.0

.......0.1.0.0.1.1

......0.1.0.0.0.1.0

.....0.1.0.0.0.0.0.1

....0.1.0.1.1.1.1.1.1

...0.1.1.0.1.0.0.0.0.0

CROSSREFS

Sequence in context: A155319 A155318 A155280 * A155364 A155332 A155388

Adjacent sequences:  A155362 A155363 A155364 * A155366 A155367 A155368

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 22 2009

STATUS

approved

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Last modified December 7 22:44 EST 2021. Contains 349590 sequences. (Running on oeis4.)