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A155409
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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 4,4 5,3 polyhexes in any orientation on a planar nXnXn triangular grid.
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0
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1, 7, 19, 37, 61, 275, 1767, 10441, 45245, 228435, 1707103, 18329337, 206589973, 2188693403, 25302969335, 385488957361, 7496386108989
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