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A155404
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Number of ways to place zero or more nonadjacent 0,0 1,0 2,1 2,2 3,0 3,1 4,0 4,2 polyhexes in any orientation on a planar nXnXn triangular grid.
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0
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1, 4, 10, 22, 40, 135, 446, 2376, 12035, 65714, 364923, 2734456, 23495580, 245925457, 2738475904, 35447846068, 514467522739
(list; graph; refs; listen; history; internal format)
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