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A155223
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Number of ways to place zero or more nonadjacent 0,0 1,0 2,0 3,0 polyhexes in any orientation on a planar nXnXn triangular grid.
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0
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1, 4, 10, 45, 176, 869, 5649, 44314, 456024, 5472215, 82109824, 1515983373, 34737855825, 992142189277
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