539456domain: NAppears in sequencesNumber of (n+1) X 3 0..7 arrays with every 2 X 2 subblock having equal diagonal elements or equal antidiagonal elements.at n=1A203729T(n,k)=Number of (n+1)X(k+1) 0..7 arrays with every 2X2 subblock having equal diagonal elements or equal antidiagonal elements.at n=4A203732