1028976domain: NAppears in sequencesDiagonal T(n,n-2) of triangle in A071951.at n=14A071953Number of (5+2) X (n+2) 0..3 arrays with every 3 X 3 subblock row and diagonal sum equal to 0 3 5 6 or 7 and every 3 X 3 column and antidiagonal sum not equal to 0 3 5 6 or 7.at n=25A252389