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A155302
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Number of ways to place zero or more nonadjacent 1,1 2,0 2,1 3,2 3,3 4,2 polyhexes in any orientation on a planar nXnXn triangular grid.
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0
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1, 4, 10, 19, 31, 129, 761, 3423, 12503, 65847, 587331, 5621100, 47590431, 445495212, 5880381069, 98943434625, 1748899641272, 32546795958370, 732964964303388
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OFFSET
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4,2
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COMMENTS
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Same series for 1,1 2,0 2,1 2,2 3,1 3,2 3,3 4,2 polyhexes.
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LINKS
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EXAMPLE
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Maximal 13 X 13 X 13 example
...............0
..............0.0
.............1.0.1
............0.1.1.0
...........0.1.0.1.0
..........1.0.0.0.0.0
.........0.1.1.0.1.0.1
........1.1.0.0.0.1.1.0
.......0.0.1.0.0.1.0.1.0
......1.0.0.0.0.0.0.0.0.0
.....0.1.1.0.1.0.1.0.1.0.1
....1.1.0.0.0.1.1.0.0.1.1.0
...0.0.1.0.0.1.0.1.0.1.0.1.0
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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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