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A155434 Number of ways to place zero or more nonadjacent 1,0 1,1 2,0 2,2 3,0 4,0 5,1 5,2 polyhexes in any orientation on a planar nXnXn triangular grid. 0
1, 7, 19, 37, 67, 293, 1143, 6649, 34591, 193101, 1138893, 9302387, 87311631, 959238749, 11114012263, 149535615901, 2269866358921 (list; graph; refs; listen; history; text; internal format)
OFFSET

5,2

LINKS

Table of n, a(n) for n=5..21.

EXAMPLE

Maximal 10 X 10 X 10 example

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

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

..........0.0.1

.........0.0.1.0

........1.0.1.0.0

.......0.1.1.0.1.1

......0.0.0.0.1.0.1

.....1.1.1.1.0.0.0.1

....1.0.0.0.1.0.0.0.1

...0.1.0.0.1.0.0.1.1.0

CROSSREFS

Sequence in context: A155394 A155412 A155420 * A155378 A155438 A155396

Adjacent sequences:  A155431 A155432 A155433 * A155435 A155436 A155437

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 22 2009

STATUS

approved

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Last modified August 12 15:12 EDT 2022. Contains 356077 sequences. (Running on oeis4.)