159803020905domain: NAppears in sequencesTrajectory of 3 under map x->x + (x-with-digits-reversed).at n=25A033648Trajectory of 15 under map x->x + (x-with-digits-reversed).at n=22A033653Trajectory of 21 under map x->x + (x-with-digits-reversed).at n=23A033656Trajectory of 69 under map x->x + (x-with-digits-reversed).at n=20A033672