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A155323
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Number of ways to place zero or more nonadjacent 0,0 1,0 2,0 2,1 2,2 3,1 4,2 polyhexes in any orientation on a planar nXnXn triangular grid.
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0
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1, 7, 19, 37, 61, 547, 3879, 20553, 82301, 862099, 11383399, 147116137, 1584915709, 26192809787, 600459150255, 15941874201057
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