9687764256domain: NAppears in sequencesNumber of (n+3) X (1+3) 0..1 arrays with no 4 X 4 subblock diagonal sum less than the antidiagonal sum.at n=6A258685T(n,k)=Number of (n+3)X(k+3) 0..1 arrays with no 4x4 subblock diagonal sum less than the antidiagonal sum.at n=21A258689