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Search: id:A155392
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| A155392 |
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Number of ways to place zero or more nonadjacent 1,1 2,1 3,0 3,1 4,2 4,3 4,4 5,2 polyhexes in any orientation on a planar nXnXn triangular grid. |
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+0
1
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| 1, 4, 13, 28, 49, 96, 501, 3463, 18127, 74376, 331418, 2409920, 26775212, 305337017, 3047283148, 31207251008, 409221933719
(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
...........1.0
..........0.1.0
.........0.0.1.1
........1.1.1.0.0
.......0.0.0.1.0.1
......1.0.1.0.0.1.0
.....0.1.1.0.1.1.0.0
....0.1.0.1.0.0.1.1.1
...0.1.0.0.1.0.1.0.0.0
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CROSSREFS
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Sequence in context: A079430 A056107 A155433 this_sequence A155435 A155371 A155355
Adjacent sequences: A155389 A155390 A155391 this_sequence A155393 A155394 A155395
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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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