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A155414 Number of ways to place zero or more nonadjacent 0,0 1,0 2,1 3,0 3,1 4,0 5,1 6,1 polyhexes in any orientation on a planar n X n X n triangular grid. 0
1, 7, 19, 52, 254, 1049, 4097, 19919, 121609, 822616, 6525958, 61351204 (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

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

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

..........0.1.0

.........1.1.0.1

........1.0.0.0.1

.......0.1.0.0.1.0

......0.1.0.0.0.1.1

.....0.0.0.0.0.0.0.1

....0.1.1.0.1.1.0.1.0

...1.1.0.1.1.0.0.0.1.0

CROSSREFS

Sequence in context: A155309 A155419 A155246 * A155374 A155272 A092053

Adjacent sequences:  A155411 A155412 A155413 * A155415 A155416 A155417

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 22 2009

STATUS

approved

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Last modified September 28 17:45 EDT 2022. Contains 357080 sequences. (Running on oeis4.)