212343domain: NAppears in sequencesNumber of (7+1) X (n+1) 0..1 arrays with every 2 X 2 subblock ne-sw antidiagonal difference nondecreasing horizontally and nw+se diagonal sum nondecreasing vertically.at n=30A258560Integers k such that k^3 + 1 is the average of two positive cubes.at n=8A273822