85106domain: NAppears in sequencesExpansion of (1-x^6) / (1-x)^6.at n=24A008488a(n) = binomial(n+6,5) - binomial(n,5).at n=23A120478Number of ways to place zero or more nonadjacent 1,0 1,1 2,0 3,0 3,1 4,0 5,1 polyhexes in any orientation on a planar n X n X n triangular grid.at n=8A155326