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A155392
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Number of ways to place zero or more nonadjacent 1,1 2,1 3,0 3,1 4,2 4,3 4,4 5,2 polyhexes in any orientation on a planar nXnXn triangular grid.
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0
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1, 4, 13, 28, 49, 96, 501, 3463, 18127, 74376, 331418, 2409920, 26775212, 305337017, 3047283148, 31207251008, 409221933719
(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
...........1.0
..........0.1.0
.........0.0.1.1
........1.1.1.0.0
.......0.0.0.1.0.1
......1.0.1.0.0.1.0
.....0.1.1.0.1.1.0.0
....0.1.0.1.0.0.1.1.1
...0.1.0.0.1.0.1.0.0.0
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CROSSREFS
| Sequence in context: A079430 A056107 A155433 * A155435 A155371 A155355
Adjacent sequences: A155389 A155390 A155391 * A155393 A155394 A155395
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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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