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A155332 Number of ways to place zero or more nonadjacent 1,1 2,1 3,1 4,1 5,0 5,1 6,2 polyhexes in any orientation on a planar nXnXn triangular grid. 0
1, 7, 19, 37, 182, 814, 3007, 16060, 115416, 773749, 6226900, 66290928, 740922136 (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

..........0.1.1

.........0.1.0.0

........0.1.0.0.1

.......0.1.0.1.1.0

......0.1.0.0.0.1.0

.....1.0.0.0.0.0.1.0

....0.1.1.1.1.1.0.1.0

...0.1.0.0.0.0.0.0.1.0

CROSSREFS

Sequence in context: A155280 A155365 A155364 * A155388 A155367 A155357

Adjacent sequences:  A155329 A155330 A155331 * A155333 A155334 A155335

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 22 2009

STATUS

approved

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Last modified May 7 09:41 EDT 2021. Contains 343649 sequences. (Running on oeis4.)