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A155433
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Number of ways to place zero or more nonadjacent 1,0 1,1 2,0 2,2 3,0 3,3 4,1 4,3 polyhexes in any orientation on a planar nXnXn triangular grid.
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0
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1, 4, 13, 28, 49, 76, 487, 3766, 20956, 91261, 385483, 3099937, 40032793, 511624885, 5661397930, 61479664849, 927273309259, 20003424034360, 509150633289499, 13132668672579046, 346049894030528596
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