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A155297
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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 polyhexes in any orientation on a planar nXnXn triangular grid.
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0
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1, 13, 37, 148, 679, 4360, 35313, 311421, 3782584, 54217988, 946558172
(list; graph; refs; listen; history; internal format)
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OFFSET
| 5,2
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EXAMPLE
| Maximal 13 X 13 X 13 example
...............0
..............1.0
.............1.0.1
............1.0.0.1
...........0.1.0.0.1
..........0.1.0.0.1.0
.........0.0.1.0.0.1.0
........0.0.0.0.0.1.0.0
.......0.1.1.1.0.0.0.0.0
......1.1.0.0.0.1.0.1.1.0
.....1.0.0.0.1.0.1.0.0.1.1
....0.0.0.1.1.0.0.1.1.0.0.1
...0.1.1.1.0.0.0.0.0.1.1.0.1
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CROSSREFS
| Sequence in context: A155300 A155252 A206443 * A181151 A155903 A139860
Adjacent sequences: A155294 A155295 A155296 * A155298 A155299 A155300
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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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