447156domain: NAppears in sequencesTriangle read by rows, 1 <= k <= n: T(n,k) = non-isomorphic colorings of a toroidal n X k grid using exactly three colors under translational symmetry and swappable colors.at n=9A294792Number of non-isomorphic colorings of a toroidal n X n grid using exactly three swappable colors.at n=3A376748