503317domain: NPropertiesPrimalityPrimeyesAppears in sequencesNumber of ways to place zero or more nonadjacent 2,0 2,1 3,0 3,1 3,2 3,3 4,1 5,1 polyhexes in any orientation on a planar nXnXn triangular grid.at n=9A155431Prime numbersat n=41780