855715domain: NAppears in sequencesNumber of (n+3)X(n+3) 0..2 arrays with every 4X4 subblock commuting with each horizontal and vertical neighbor 4X4 subblock.at n=6A186580Number of (n+3)X10 0..2 arrays with every 4X4 subblock commuting with each horizontal and vertical neighbor 4X4 subblock.at n=6A186587