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A155307
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Number of ways to place zero or more nonadjacent 0,0 1,0 2,1 3,0 3,1 4,0 polyhexes in any orientation on a planar nXnXn triangular grid.
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0
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1, 4, 13, 37, 146, 620, 2737, 17298, 136979, 1185666, 12752003, 161758550, 2364549128, 42702118766
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