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A155335
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Number of ways to place zero or more nonadjacent 0,0 1,0 2,0 3,1 4,1 5,2 6,3 polyhexes in any orientation on a planar nXnXn triangular grid.
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0
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1, 7, 19, 58, 199, 688, 3581, 19670, 126183, 979162, 8439890, 86791208, 1020461563
(list; graph; refs; listen; history; internal format)
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OFFSET
| 6,2
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EXAMPLE
| Maximal 12 X 12 X 12 example
..............1
.............0.1
............1.0.1
...........1.0.1.0
..........1.0.0.1.0
.........0.1.0.1.0.1
........0.1.0.1.0.0.1
.......0.0.1.0.0.0.0.1
......1.0.0.1.0.0.0.1.0
.....0.1.0.0.0.0.0.0.1.0
....0.0.1.1.0.0.0.0.1.0.0
...0.0.0.0.1.1.1.0.1.0.0.0
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CROSSREFS
| Sequence in context: A126361 A069005 A000413 * A155226 A179406 A165683
Adjacent sequences: A155332 A155333 A155334 * A155336 A155337 A155338
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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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