1758867domain: NAppears in sequencesTrajectory of 3 under map x->x + (x-with-digits-reversed).at n=15A033648Trajectory of 15 under map x->x + (x-with-digits-reversed).at n=12A033653Trajectory of 21 under map x->x + (x-with-digits-reversed).at n=13A033656Trajectory of 69 under map x->x + (x-with-digits-reversed).at n=10A033672