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A155335 Number of ways to place zero or more nonadjacent 0,0 1,0 2,0 3,1 4,1 5,2 6,3 polyhexes in any orientation on a planar nXnXn triangular grid. 0
1, 7, 19, 58, 199, 688, 3581, 19670, 126183, 979162, 8439890, 86791208, 1020461563 (list; graph; refs; listen; history; text; internal format)
OFFSET

6,2

LINKS

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

EXAMPLE

Maximal 12 X 12 X 12 example

..............1

.............0.1

............1.0.1

...........1.0.1.0

..........1.0.0.1.0

.........0.1.0.1.0.1

........0.1.0.1.0.0.1

.......0.0.1.0.0.0.0.1

......1.0.0.1.0.0.0.1.0

.....0.1.0.0.0.0.0.0.1.0

....0.0.1.1.0.0.0.0.1.0.0

...0.0.0.0.1.1.1.0.1.0.0.0

CROSSREFS

Sequence in context: A069005 A000413 A263335 * A155226 A229442 A179406

Adjacent sequences:  A155332 A155333 A155334 * A155336 A155337 A155338

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 22 2009

STATUS

approved

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Last modified May 17 12:43 EDT 2021. Contains 343971 sequences. (Running on oeis4.)