576096domain: NAppears in sequencesNumber of rooted toroidal maps with 2 faces, n vertices and no isthmuses.at n=14A006469Number of ways to arrange 3 indistinguishable points on an n X n X n triangular grid so that no three points are in the same row or diagonal.at n=16A194475a(n) = 3*(5^n-3^n)/2.at n=8A226511