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A155305
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Number of ways to place zero or more nonadjacent 1,1 2,0 2,1 3,2 3,3 4,4 polyhexes in any orientation on a planar nXnXn triangular grid.
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0
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1, 7, 25, 64, 217, 1298, 10738, 90390, 827265, 9950319, 159818687, 3209355205, 75527888278, 2156343784054
(list; graph; refs; listen; history; internal format)
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OFFSET
| 4,2
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EXAMPLE
| Maximal 11 X 11 X 11 example
.............1
............0.1
...........0.1.0
..........0.0.1.1
.........0.0.1.0.0
........1.0.0.0.0.1
.......0.1.1.0.1.1.0
......1.1.0.0.0.0.1.1
.....1.0.0.1.0.1.0.0.1
....0.0.1.1.0.0.1.1.0.0
...0.1.1.0.1.0.1.0.1.1.0
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CROSSREFS
| Sequence in context: A185787 A001845 A127765 * A155290 A056685 A001296
Adjacent sequences: A155302 A155303 A155304 * A155306 A155307 A155308
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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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