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A155220
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Number of ways to place zero or more nonadjacent 1,0 1,1 2,1 2,2 polyhexes in any orientation on a planar nXnXn triangular grid.
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0
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1, 4, 10, 19, 109, 692, 3521, 31519, 398368, 5171923, 89984622, 2185316954, 63742209751, 2336382318172, 113584162550499, 6998045379053544, 543364715394976386, 54434393498867053000, 6983398903852168886345
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