540344domain: NAppears in sequencesSeventh column (m=6) of convolution triangle A059594(n,m).at n=13A059595Number of ways to place zero or more nonadjacent 0,0 1,0 2,1 3,2 4,2 polyhexes in any orientation on a planar nXnXn triangular grid.at n=8A155247