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A155372
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Number of ways to place zero or more nonadjacent 1,1 2,1 3,0 3,1 3,2 3,3 4,2 5,2 polyhexes in any orientation on a planar nXnXn triangular grid.
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0
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1, 7, 19, 37, 61, 206, 1719, 10790, 47817, 214975, 1559070, 18834488, 235320165, 2540394252, 29093246624, 443617991373, 9324012818913
(list; graph; refs; listen; history; internal format)
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OFFSET
| 5,2
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COMMENTS
| Same series for 1,0 2,0 3,0 3,1 3,2 3,3 4,3 5,3 polyhexes.
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EXAMPLE
| Maximal 10 X 10 X 10 example
............0
...........1.0
..........0.1.0
.........1.1.1.1
........0.0.1.0.0
.......0.0.0.1.0.0
......1.0.1.0.0.0.1
.....0.1.1.0.1.1.1.0
....0.0.1.1.0.0.1.1.1
...0.0.1.0.1.0.1.0.0.0
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CROSSREFS
| Sequence in context: A155405 A155448 A155446 * A155373 A155444 A155439
Adjacent sequences: A155369 A155370 A155371 * A155373 A155374 A155375
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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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