901009domain: NPropertiesPrimalityPrimeyesAppears in sequencesa(1)=0 a(2)=1 a(n)=concatenate(a(n-1)a(n-2)...a(1))-a(n-1).at n=4A069054Start with 100103 and repeatedly reverse the digits and add 2 to get the next term.at n=7A120218Prime numbersat n=71350