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A155425
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Number of ways to place zero or more nonadjacent 0,0 1,0 2,1 3,2 3,3 4,2 5,2 6,3 polyhexes in any orientation on a planar nXnXn triangular grid.
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0
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1, 7, 19, 37, 94, 289, 1342, 7169, 33736, 187935, 1191407, 9471948, 87427106, 862847938
(list; graph; refs; listen; history; internal format)
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OFFSET
| 6,2
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EXAMPLE
| Maximal 12 X 12 X 12 example
..............0
.............0.0
............0.0.0
...........1.0.0.1
..........0.1.1.1.0
.........1.0.0.0.1.0
........0.1.0.0.0.1.1
.......0.1.0.0.0.0.0.0
......1.1.0.0.0.0.0.1.1
.....0.0.1.0.0.0.0.1.0.0
....0.0.0.1.0.1.1.1.0.0.0
...0.0.0.1.0.1.0.0.1.0.0.0
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CROSSREFS
| Sequence in context: A155393 A155314 A155321 * A155410 A155429 A155346
Adjacent sequences: A155422 A155423 A155424 * A155426 A155427 A155428
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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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