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Search: id:A155345
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| A155345 |
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Number of ways to place zero or more nonadjacent 0,0 1,0 2,1 3,1 4,1 5,2 6,2 polyhexes in any orientation on a planar nXnXn triangular grid. |
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+0
1
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| 1, 7, 19, 52, 193, 781, 3781, 20901, 131341, 1017012, 9065243, 91925870
(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
..............1
.............1.0
............0.1.0
...........0.1.0.0
..........0.1.0.0.0
.........0.0.1.0.0.1
........0.0.1.0.0.0.1
.......1.1.0.0.0.0.1.0
......0.0.1.1.1.0.0.1.0
.....1.1.0.0.0.1.1.0.1.0
....0.0.1.1.1.0.0.0.1.0.0
...0.0.0.0.0.1.1.0.0.1.0.0
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CROSSREFS
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Sequence in context: A155423 A155347 A155385 this_sequence A155309 A155419 A155246
Adjacent sequences: A155342 A155343 A155344 this_sequence A155346 A155347 A155348
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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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