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Search: id:A155297
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| A155297 |
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Number of ways to place zero or more nonadjacent 0,0 1,0 2,0 3,1 4,1 5,2 polyhexes in any orientation on a planar nXnXn triangular grid. |
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+0
1
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| 1, 13, 37, 148, 679, 4360, 35313, 311421, 3782584, 54217988, 946558172
(list; graph; listen)
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OFFSET
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5,2
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EXAMPLE
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Maximal 13 X 13 X 13 example
...............0
..............1.0
.............1.0.1
............1.0.0.1
...........0.1.0.0.1
..........0.1.0.0.1.0
.........0.0.1.0.0.1.0
........0.0.0.0.0.1.0.0
.......0.1.1.1.0.0.0.0.0
......1.1.0.0.0.1.0.1.1.0
.....1.0.0.0.1.0.1.0.0.1.1
....0.0.0.1.1.0.0.1.1.0.0.1
...0.1.1.1.0.0.0.0.0.1.1.0.1
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CROSSREFS
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Sequence in context: A166101 A155300 A155252 this_sequence A155903 A139860 A036570
Adjacent sequences: A155294 A155295 A155296 this_sequence A155298 A155299 A155300
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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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