1242150

Appears in sequences

• Number of ways to place 3 nonattacking bishops on an n X n toroidal board.at n=14A177756
• Number of non-attacking placements of 3 rooks on an n X n board.at n=14A179058
• Number of minimum total dominating sets in the n X n rook complement graph.at n=14A303212
• a(n) = C(n, Q(n+3, 4)-1)*C(n, Q(n+1, 4)) + C(n, Q(3*n+1, 4))*C(n, Q(3*n+3, 4)) where C = binomial and Q(x, y) = floor(x/y).at n=15A380121