3395402domain: NAppears in sequencesNumber of nX4 0..1 arrays with every element unequal to 1, 2, 3, 4 or 7 king-move adjacent elements, with upper left element zero.at n=7A304897a(n) is the number of d+/d- diagonally convex polyplets (polyominoes which need only touch at corners) with n cells.at n=9A319321