267014domain: NAppears in sequencesa(n) = -(n-3)*a(n-1) + 2*(n-2)^2.at n=9A051398Number of nX5 0..1 arrays with every element unequal to 0, 1, 3, 5, 6 or 8 king-move adjacent elements, with upper left element zero.at n=9A316424