17616908domain: NAppears in sequencesNumber of (n+2)X(n+2) 0..7 arrays with every 3X3 subblock commuting with each horizontal and vertical neighbor 3X3 subblock.at n=3A186573T(n,k)=Number of (n+2)X(k+2) 0..7 arrays with every 3X3 subblock commuting with each horizontal and vertical neighbor 3X3 subblock.at n=24A186574