1678073domain: NPropertiesPrimalityPrimeyesAppears in sequencesNumber of ways to place zero or more nonadjacent 0,0 1,0 2,1 2,2 3,0 3,1 4,2 5,2 polyhexes in any orientation on a planar nXnXn triangular grid.at n=10A155406Prime numbersat n=126608