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A155353
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Number of ways to place zero or more nonadjacent 2,1 2,2 3,0 3,1 3,3 4,2 4,3 polyhexes in any orientation on a planar nXnXn triangular grid.
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0
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1, 7, 19, 37, 82, 439, 3646, 20995, 111047, 888450, 11127243, 160502934, 2195406729, 35231318268, 762257930909, 21186573131078, 666712624377399
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OFFSET
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4,2
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COMMENTS
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Same series for 2,1 2,2 3,0 3,1 3,2 3,3 4,2 4,3 polyhexes.
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LINKS
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EXAMPLE
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Maximal 12 X 12 X 12 example
..............0
.............1.1
............1.0.1
...........0.1.1.0
..........0.1.0.0.0
.........0.0.0.0.1.1
........0.1.1.0.1.0.1
.......0.1.0.1.0.1.1.0
......0.0.1.1.0.1.0.0.0
.....1.1.0.0.1.0.0.1.1.0
....1.0.1.1.0.0.0.1.0.1.1
...0.1.1.0.0.0.0.0.1.1.0.0
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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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