119940domain: NAppears in sequencesNumber of ways to place zero or more nonadjacent 1,1 2,1 3,0 3,1 3,2 4,1 5,1 polyhexes in any orientation on a planar n X n X n triangular grid.at n=8A155325Number of standardized 4-connected corner polyominoes of inner site-perimeter n.at n=8A216946