Trajectory of 99 under map x->x + (x-with-digits-reversed).

Terms

a(0) =99a(1) =198a(2) =1089a(3) =10890a(4) =20691a(5) =40293a(6) =79497a(7) =158994a(8) =658845a(9) =1207701a(10) =2284722a(11) =4559544a(12) =9019098a(13) =17928207a(14) =88211178a(15) =175322466a(16) =839546037a(17) =1570191975a(18) =7362102726a(19) =13634115363a(20) =49985258994a(21) =99970517988