737472domain: NAppears in sequencesMatrix square of triangle A107721, read by rows.at n=39A107722Number of (n+2) X (5+2) 0..1 arrays with no 3 X 3 subblock diagonal sum 0 and no antidiagonal sum 3 and no row sum 0 or 3 and no column sum 0 or 3.at n=28A258963