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A155226
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Number of ways to place zero or more nonadjacent 0,0 1,0 2,1 3,1 polyhexes in any orientation on a planar nXnXn triangular grid.
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0
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1, 7, 19, 58, 329, 2350, 20015, 218371, 3090717, 58164789, 1393078738, 42785732400, 1703751776933, 87700729777393, 5826804979644472
(list; graph; refs; listen; history; internal format)
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OFFSET
| 3,2
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EXAMPLE
| Maximal 11 X 11 X 11 example
.............0
............1.0
...........0.1.1
..........1.0.0.1
.........1.0.0.0.0
........0.1.0.0.1.1
.......0.1.0.1.1.0.0
......1.0.0.0.0.0.1.1
.....1.0.1.0.0.1.1.0.0
....0.1.0.1.1.0.0.0.1.1
...0.1.0.0.0.1.0.1.1.0.0
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CROSSREFS
| Sequence in context: A069005 A000413 A155335 * A179406 A165683 A092359
Adjacent sequences: A155223 A155224 A155225 * A155227 A155228 A155229
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KEYWORD
| nonn
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AUTHOR
| R. H. Hardin (rhhardin(AT)att.net) Jan 22 2009
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