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A155429 Number of ways to place zero or more nonadjacent 1,0 1,1 2,0 3,1 4,2 5,3 6,2 6,3 polyhexes in any orientation on a planar nXnXn triangular grid. 0
1, 7, 19, 37, 94, 310, 1252, 6074, 34841, 214176, 1426680, 11020627, 99435514, 1058044983, 12942244135 (list; graph; refs; listen; history; text; internal format)
OFFSET

6,2

LINKS

Table of n, a(n) for n=6..20.

EXAMPLE

Maximal 10 X 10 X 10 example

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

...........0.0

..........1.0.0

.........1.0.0.0

........0.1.1.1.1

.......0.0.0.0.0.1

......1.1.0.0.0.1.0

.....1.0.1.0.0.0.0.0

....0.0.0.1.0.1.0.0.0

...0.0.0.0.1.1.0.0.0.0

CROSSREFS

Sequence in context: A155321 A155425 A155410 * A155346 A155398 A155431

Adjacent sequences:  A155426 A155427 A155428 * A155430 A155431 A155432

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 22 2009

STATUS

approved

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Last modified June 27 10:50 EDT 2022. Contains 354896 sequences. (Running on oeis4.)