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A155249
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Number of ways to place zero or more nonadjacent 0,0 1,0 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, 2, 4, 8, 14, 47, 195, 837, 3369, 18578, 136739, 1165320, 10402584, 111016225, 1486854375, 24007190141, 439055546197, 9360979774817, 239960578837701, 7384548591700592, 266113431327167571
(list; graph; refs; listen; history; internal format)
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