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A155423
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Number of ways to place zero or more nonadjacent 0,0 1,0 2,1 3,1 4,2 5,2 6,3 7,3 polyhexes in any orientation on a planar nXnXn triangular grid.
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0
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1, 7, 19, 52, 172, 643, 2936, 14954, 84090, 537490, 4238593, 38671134
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