1412256400domain: NAppears in sequencesNumber of (n+1)X2 0..3 arrays with no 2X2 subblock sum equal to any horizontal or vertical neighbor 2X2 subblock sum.at n=6A185572T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with no 2X2 subblock sum equal to any horizontal or vertical neighbor 2X2 subblock sum.at n=21A185575