5654805domain: NAppears in sequencesNumber of (n+3)X7 0..3 arrays with every 4X4 subblock commuting with each horizontal and vertical neighbor 4X4 subblock.at n=5A186594Number of (n+3)X9 0..3 arrays with every 4X4 subblock commuting with each horizontal and vertical neighbor 4X4 subblock.at n=3A186596