408631domain: NPropertiesPrimalityPrimeyesAppears in sequencesa(n)=a(n-1)+a(n-2)-d, where d=a(n/3) if 3 divides n, else d=0; 2 initial terms.at n=29A050193Number of (n+4)X7 binary arrays with every 5X5 subblock commuting with each horizontal and vertical neighbor 5X5 subblock.at n=19A186603Prime numbersat n=34502