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A155437 Number of ways to place zero or more nonadjacent 1,0 1,1 2,0 2,2 3,1 3,2 4,1 5,1 polyhexes in any orientation on a planar nXnXn triangular grid. 0
1, 7, 19, 37, 100, 428, 1830, 11336, 67788, 454698, 3575689, 35749465, 410313440, 5458200826, 83668909890 (list; graph; refs; listen; history; text; internal format)
OFFSET

5,2

LINKS

Table of n, a(n) for n=5..19.

EXAMPLE

Maximal 10 X 10 X 10 example

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

...........1.1

..........1.0.1

.........0.1.1.0

........0.1.0.0.0

.......0.1.0.0.1.0

......0.0.0.0.0.1.0

.....1.1.0.0.0.0.1.1

....1.0.1.1.1.0.1.0.1

...0.1.1.0.0.0.0.1.1.0

CROSSREFS

Sequence in context: A155329 A155424 A155349 * A155299 A155379 A155243

Adjacent sequences:  A155434 A155435 A155436 * A155438 A155439 A155440

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 22 2009

STATUS

approved

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Last modified August 10 22:36 EDT 2022. Contains 356046 sequences. (Running on oeis4.)