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A155422
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Number of ways to place zero or more nonadjacent 1,0 1,1 2,0 3,1 4,1 5,2 6,1 6,2 polyhexes in any orientation on a planar nXnXn triangular grid.
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0
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1, 7, 19, 37, 118, 502, 1873, 7452, 43554, 288884, 1929451, 15024812, 143416801, 1509097096
(list; graph; refs; listen; history; internal format)
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OFFSET
| 6,2
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EXAMPLE
| Maximal 11 X 11 X 11 example
.............0
............0.1
...........0.0.1
..........0.1.1.0
.........1.1.0.0.0
........1.0.0.0.1.1
.......0.1.0.0.0.0.1
......0.0.0.0.0.0.1.0
.....0.0.0.1.1.0.0.1.0
....1.0.1.1.0.1.0.1.0.0
...0.1.1.0.0.0.0.0.1.1.0
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CROSSREFS
| Sequence in context: A155359 A098481 A155334 * A155370 A155442 A155324
Adjacent sequences: A155419 A155420 A155421 * A155423 A155424 A155425
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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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