3413126694domain: NAppears in sequencesNumber of (n+1)X2 0..3 arrays with no 2X2 subblock commuting with any of its horizontal and vertical 2X2 subblock neighbors.at n=6A186554T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with no 2X2 subblock commuting with any of its horizontal and vertical 2X2 subblock neighbors.at n=21A186558