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A155300 Number of ways to place zero or more nonadjacent 0,0 1,0 2,0 3,1 4,2 5,2 polyhexes in any orientation on a planar nXnXn triangular grid. 0
1, 13, 37, 136, 613, 4136, 32205, 274737, 3263659, 46765263, 810265107 (list; graph; refs; listen; history; text; internal format)
OFFSET

5,2

LINKS

Table of n, a(n) for n=5..15.

EXAMPLE

Maximal 11 X 11 X 11 example

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

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

...........1.0.0

..........0.1.1.1

.........0.0.0.0.1

........1.0.0.0.0.1

.......1.0.0.0.1.0.0

......1.0.1.0.0.1.1.1

.....0.1.0.1.0.0.0.0.1

....0.0.1.0.1.1.1.0.0.1

...0.0.1.0.0.0.0.1.0.0.0

CROSSREFS

Sequence in context: A333281 A195543 A262755 * A155252 A265653 A206443

Adjacent sequences:  A155297 A155298 A155299 * A155301 A155302 A155303

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 22 2009

STATUS

approved

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Last modified January 27 03:09 EST 2022. Contains 350601 sequences. (Running on oeis4.)