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Search: id:A155335
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| A155335 |
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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 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, 58, 199, 688, 3581, 19670, 126183, 979162, 8439890, 86791208, 1020461563
(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
.............0.1
............1.0.1
...........1.0.1.0
..........1.0.0.1.0
.........0.1.0.1.0.1
........0.1.0.1.0.0.1
.......0.0.1.0.0.0.0.1
......1.0.0.1.0.0.0.1.0
.....0.1.0.0.0.0.0.0.1.0
....0.0.1.1.0.0.0.0.1.0.0
...0.0.0.0.1.1.1.0.1.0.0.0
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CROSSREFS
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Sequence in context: A126361 A069005 A000413 this_sequence A155226 A165683 A092359
Adjacent sequences: A155332 A155333 A155334 this_sequence A155336 A155337 A155338
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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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