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A155441
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Number of ways to place zero or more nonadjacent 2,1 3,0 3,1 3,3 4,2 4,3 5,1 5,2 polyhexes in any orientation on a planar nXnXn triangular grid.
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0
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1, 7, 19, 37, 61, 224, 1849, 11422, 49981, 224398, 1780640, 22690257, 281350590, 2951548767, 34313995173, 571260880157, 12982237127311
(list; graph; refs; listen; history; internal format)
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OFFSET
| 5,2
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EXAMPLE
| Maximal 10 X 10 X 10 example
............0
...........0.1
..........1.0.1
.........0.1.1.0
........0.1.0.1.0
.......0.0.0.1.0.0
......0.1.1.0.0.1.0
.....1.1.0.0.1.0.1.1
....1.0.1.1.0.1.1.0.0
...0.0.1.0.0.0.0.1.1.0
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CROSSREFS
| Sequence in context: A155373 A155444 A155439 * A155447 A155340 A155409
Adjacent sequences: A155438 A155439 A155440 * A155442 A155443 A155444
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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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