148311domain: NAppears in sequencesNumber of ways to place zero or more nonadjacent 2,0 3,0 4,1 4,2 4,3 4,4 5,1 6,2 polyhexes in any orientation on a planar nXnXn triangular grid.at n=9A155444Number of n X 5 0..1 arrays with rows and antidiagonals unimodal and columns nondecreasing.at n=14A224143