13887359domain: NPropertiesPrimalityPrimeyesAppears in sequencesa(0) = 13; for n > 0, a(n) is the greatest prime factor of PreviousPrime(a(n-1))*a(n-1)-1 where PreviousPrime(prime(k))=prime(k-1).at n=16A031442Prime numbersat n=903277