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A155339
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Number of ways to place zero or more nonadjacent 0,0 1,0 2,1 2,2 3,0 3,1 3,3 polyhexes in any orientation on a planar nXnXn triangular grid.
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0
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1, 3, 7, 13, 23, 37, 183, 1053, 5351, 24397, 99215, 617661, 5897471, 64288141, 714391583, 7672307261, 95370104207, 1561595349917, 31946273565055
(list; graph; refs; listen; history; internal format)
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OFFSET
| 3,2
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EXAMPLE
| Maximal 10 X 10 X 10 example
............1
...........1.0
..........0.1.1
.........1.1.0.1
........0.0.0.0.0
.......0.1.0.1.1.0
......1.0.1.1.0.0.1
.....0.1.0.0.1.0.1.0
....1.1.0.0.1.0.0.1.1
...1.0.1.1.0.0.1.1.0.1
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CROSSREFS
| Sequence in context: A081995 A053599 A136851 * A122886 A154691 A078447
Adjacent sequences: A155336 A155337 A155338 * A155340 A155341 A155342
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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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