311924domain: NAppears in sequencesNumbers k such that 265*2^k + 1 is prime.at n=31A053349Number of ways to place zero or more nonadjacent 0,0 1,0 2,1 3,2 4,2 5,3 6,4 7,4 polyhexes in any orientation on a planar nXnXn triangular grid.at n=9A155427