401534domain: NAppears in sequencesNumber of (w,x,y,z) with all terms in {1,...,n} and w<=2x and y<=3z.at n=28A212513Number of (n+2)X(4+2) 0..3 arrays with every 3X3 subblock row and column sum equal to 0 3 5 6 or 7 and every 3X3 diagonal and antidiagonal sum not equal to 0 3 5 6 or 7.at n=14A252144