112046domain: NAppears in sequencesNumber of ways to place zero or more nonadjacent 0,0 1,0 1,1 2,0 3,0 4,0 4,1 polyhexes in any orientation on a planar nXnXn triangular grid.at n=8A155320Number of rooted triangulations of genus 1 with 2n edges.at n=3A361141