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A155431
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Number of ways to place zero or more nonadjacent 2,0 2,1 3,0 3,1 3,2 3,3 4,1 5,1 polyhexes in any orientation on a planar nXnXn triangular grid.
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0
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1, 7, 19, 37, 94, 344, 2238, 14169, 77290, 503317, 4355803, 49651747, 642476027, 8840925123, 141069431209, 2761281750433
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OFFSET
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5,2
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COMMENTS
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Same series for 2,0 2,1 3,0 3,2 3,3 4,1 5,1 polyhexes.
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LINKS
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EXAMPLE
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Maximal 10 X 10 X 10 example
............0
...........0.0
..........1.1.0
.........1.1.1.1
........0.1.0.0.0
.......0.1.0.0.1.0
......1.0.0.0.0.1.1
.....0.1.0.0.0.0.1.1
....0.1.1.1.1.0.1.1.0
...0.0.1.1.0.0.1.0.0.0
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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