205879domain: NPropertiesPrimalityPrimeyesAppears in sequencesNumber of (n+2) X 8 0..2 arrays with every 3 X 3 subblock commuting with each horizontal and vertical neighbor 3 X 3 subblock.at n=11A186565Number T(n,k) of tilings of a 2k X n rectangle using dominoes and 2 X 2 tiles.at n=51A352431Prime numbersat n=18453