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Search: id:A155356
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| A155356 |
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Number of ways to place zero or more nonadjacent 0,0 1,0 1,1 2,0 2,1 2,2 3,1 3,2 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, 268, 2207, 13527, 65442, 532199, 7461240, 113949026, 1537124321, 25756946558, 635120397887, 20097790938202, 675874617024695, 25863870998834477, 1279264911762340761
(list; graph; listen)
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OFFSET
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3,2
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COMMENT
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Same series for 0,0 1,0 1,1 2,0 2,2 3,1 3,2 polyhexes.
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EXAMPLE
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Maximal 10 X 10 X 10 example
............0
...........1.1
..........1.1.1
.........0.1.1.1
........0.0.0.0.0
.......0.0.1.1.0.0
......0.0.1.1.1.0.0
.....1.1.0.1.1.0.1.1
....1.1.1.0.1.0.1.1.1
...1.1.1.0.0.0.1.1.1.0
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CROSSREFS
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Sequence in context: A155435 A155371 A155355 this_sequence A060488 A054968 A087035
Adjacent sequences: A155353 A155354 A155355 this_sequence A155357 A155358 A155359
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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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