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Search: id:A155372
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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
1
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| 1, 7, 19, 37, 61, 206, 1719, 10790, 47817, 214975, 1559070, 18834488, 235320165, 2540394252, 29093246624, 443617991373, 9324012818913
(list; graph; listen)
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OFFSET
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5,2
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COMMENT
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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
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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
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Sequence in context: A155405 A155448 A155446 this_sequence A155373 A155444 A155439
Adjacent sequences: A155369 A155370 A155371 this_sequence A155373 A155374 A155375
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KEYWORD
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nonn
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AUTHOR
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Ron Hardin (rhhardin(AT)att.net) Jan 22 2009
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