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A155283 Number of ways to place zero or more nonadjacent 0,0 1,0 2,0 3,0 4,1 5,2 polyhexes in any orientation on a planar nXnXn triangular grid. 0
1, 13, 37, 190, 798, 5458, 43604, 402857, 5033744, 71523854, 1310467409, 28108624809 (list; graph; refs; listen; history; text; internal format)
OFFSET

5,2

LINKS

Table of n, a(n) for n=5..16.

EXAMPLE

Maximal 12 X 12 X 12 example

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

.............1.0

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

...........0.1.0.1

..........0.0.1.0.1

.........0.0.0.1.0.1

........1.1.1.0.0.1.0

.......1.0.0.0.0.1.0.0

......1.0.1.0.0.0.0.0.0

.....1.0.1.0.1.0.1.1.1.1

....0.0.1.0.0.1.0.0.0.0.1

...1.1.1.0.0.0.1.1.1.1.0.1

CROSSREFS

Sequence in context: A173872 A155241 A155222 * A155282 A193646 A155236

Adjacent sequences: A155280 A155281 A155282 * A155284 A155285 A155286

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 22 2009

STATUS

approved

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Last modified February 3 14:36 EST 2023. Contains 360035 sequences. (Running on oeis4.)