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A155399 Number of ways to place zero or more nonadjacent 1,0 1,1 2,0 3,0 4,1 5,1 6,0 6,1 polyhexes in any orientation on a planar n X n X n triangular grid. 0
1, 7, 19, 43, 239, 1041, 3863, 18481, 111137, 720077, 5291974, 48305684 (list; graph; refs; listen; history; text; internal format)
OFFSET

6,2

LINKS

Table of n, a(n) for n=6..17.

EXAMPLE

Maximal 10 X 10 X 10 example

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

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

..........0.0.1

.........0.0.0.1

........1.1.0.1.0

.......1.0.0.0.1.0

......1.0.0.0.0.1.1

.....0.1.0.0.0.0.0.0

....0.1.0.1.1.1.0.0.1

...1.1.0.1.0.0.1.1.1.0

CROSSREFS

Sequence in context: A155430 A155247 A113927 * A330854 A268926 A212955

Adjacent sequences:  A155396 A155397 A155398 * A155400 A155401 A155402

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 22 2009

STATUS

approved

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Last modified June 17 00:17 EDT 2021. Contains 345080 sequences. (Running on oeis4.)