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Search: id:A155349
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| A155349 |
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Number of ways to place zero or more nonadjacent 1,0 1,1 2,0 3,1 4,2 5,1 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, 100, 428, 1794, 11180, 68280, 460602, 3595480, 35769940, 408682401, 5473453986, 84561686844
(list; graph; listen)
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OFFSET
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5,2
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EXAMPLE
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Maximal 10 X 10 X 10 example
............0
...........1.0
..........1.0.0
.........0.1.1.1
........0.0.0.0.1
.......0.1.0.0.1.0
......0.0.1.0.0.0.0
.....1.1.1.0.0.0.1.1
....1.0.0.0.1.0.1.0.1
...0.1.0.0.0.1.1.0.0.0
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CROSSREFS
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Sequence in context: A155431 A155329 A155424 this_sequence A155437 A155299 A155379
Adjacent sequences: A155346 A155347 A155348 this_sequence A155350 A155351 A155352
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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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