175998domain: NAppears in sequencesNumber of ways to place zero or more nonadjacent 0,0 1,0 1,1 2,0 3,0 3,1 polyhexes in any orientation on a planar nXnXn triangular grid.at n=8A155257Number of length 5+1 0..n arrays with the sum of the maximum of each adjacent pair multiplied by some arrangement of +-1 equal to zero.at n=8A250649