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A155221
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Number of ways to place zero or more nonadjacent 1,1 2,0 2,1 2,2 polyhexes in any orientation on a planar nXnXn triangular grid.
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0
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1, 7, 25, 70, 500, 7410, 81126, 1254921, 35099024, 1318005942, 58686994598, 3824088664649, 368413623404582, 47231934784100638, 8189977602765893624
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