441869domain: NAppears in sequencesNumber of (n+2)X(n+2) 0..4 arrays with every 3X3 subblock commuting with each horizontal and vertical neighbor 3X3 subblock.at n=3A186578T(n,k) = Number of (n+2) X (k+2) 0..4 arrays with every 3 X 3 subblock commuting with each horizontal and vertical neighbor 3 X 3 subblock.at n=24A186579