25411507domain: NAppears in sequencesIccanobirt numbers (9 of 15): a(n) = R(a(n-1) + a(n-2) + R(a(n-3))), where R is the digit reversal function A004086.at n=28A102119Iccanobirt semiprimes (9 of 15): Semiprime numbers in A102119.at n=6A102199