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A155239
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Number of ways to place zero or more nonadjacent 1,1 2,1 3,0 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, 144, 940, 6913, 44442, 383165, 4775804, 73750670, 1270986469, 26693174009, 724206936085, 24621385504435
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