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Search: id:A155441
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| A155441 |
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Number of ways to place zero or more nonadjacent 2,1 3,0 3,1 3,3 4,2 4,3 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, 61, 224, 1849, 11422, 49981, 224398, 1780640, 22690257, 281350590, 2951548767, 34313995173, 571260880157, 12982237127311
(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
...........0.1
..........1.0.1
.........0.1.1.0
........0.1.0.1.0
.......0.0.0.1.0.0
......0.1.1.0.0.1.0
.....1.1.0.0.1.0.1.1
....1.0.1.1.0.1.1.0.0
...0.0.1.0.0.0.0.1.1.0
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CROSSREFS
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Sequence in context: A155373 A155444 A155439 this_sequence A155447 A155340 A155409
Adjacent sequences: A155438 A155439 A155440 this_sequence A155442 A155443 A155444
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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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