74210domain: NAppears in sequencesNumber of ways to place zero or more nonadjacent 1,1 2,1 3,1 3,2 4,0 4,1 5,1 6,1 polyhexes in any orientation on a planar nXnXn triangular grid.at n=8A155377Numbers which are the sum of two squared primes in exactly three ways (ignoring order).at n=31A226562