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A155344
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Number of ways to place zero or more nonadjacent 0,0 1,0 2,1 3,1 4,0 4,1 5,0 polyhexes in any orientation on a planar nXnXn triangular grid.
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0
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1, 4, 13, 37, 146, 632, 2601, 11932, 76177, 558787, 4627682, 46978044, 543470526
(list; graph; refs; listen; history; internal format)
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