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Search: id:A155347
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| A155347 |
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Number of ways to place zero or more nonadjacent 0,0 1,0 2,1 3,1 4,2 5,2 6,3 polyhexes in any orientation on a planar nXnXn triangular grid. |
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+0
1
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| 1, 7, 19, 52, 178, 691, 3685, 20423, 128624, 1025960, 9573074, 102844369
(list; graph; listen)
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OFFSET
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6,2
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EXAMPLE
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Maximal 12 X 12 X 12 example
..............0
.............0.0
............0.0.0
...........1.1.0.0
..........0.0.1.1.0
.........0.0.0.0.1.1
........0.0.1.1.0.0.1
.......0.1.1.0.0.1.0.0
......1.1.0.0.1.1.0.0.1
.....1.0.0.1.1.0.0.1.1.0
....0.0.1.1.0.0.1.1.0.0.0
...0.0.0.0.0.1.1.0.0.0.0.0
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CROSSREFS
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Sequence in context: A100545 A100450 A155423 this_sequence A155385 A155345 A155309
Adjacent sequences: A155344 A155345 A155346 this_sequence A155348 A155349 A155350
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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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