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A155222
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Number of ways to place zero or more nonadjacent 1,0 1,1 2,0 3,0 polyhexes in any orientation on a planar nXnXn triangular grid.
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0
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1, 13, 37, 184, 1433, 15532, 213600, 3754855, 93144364, 3159998575, 143228568126, 8737142545792, 720729233703571
(list; graph; refs; listen; history; internal format)
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OFFSET
| 3,2
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EXAMPLE
| Maximal 12 X 12 X 12 example
..............0
.............1.1
............0.0.1
...........1.0.0.1
..........1.0.0.0.0
.........0.1.0.0.1.1
........1.0.1.0.1.0.0
.......0.1.0.0.1.0.1.0
......0.0.1.1.0.0.1.0.1
.....1.1.0.0.0.1.1.0.0.1
....1.0.0.0.1.0.0.0.1.0.1
...1.0.1.1.1.0.1.1.1.0.1.0
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CROSSREFS
| Sequence in context: A147615 A173872 A155241 * A155283 A155282 A193646
Adjacent sequences: A155219 A155220 A155221 * A155223 A155224 A155225
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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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