A118535 - OEIS

%I #10 Aug 14 2020 13:00:51

%S 1,21,32,43,54,65,76,87,98,109,921,149,961,189,1001,1021,1221,1241,

%T 1441,1461,1661,1681,1881,1901,1111,1131,1331,1351,1551,1571,1771,

%U 1791,1991,2011,1122,2231,1342,2451,1562,2671,1782,2891,2002,2022

%N Start with 1 and repeatedly reverse the digits and add 20 to get the next term.

%H Harvey P. Dale, <a href="/A118535/b118535.txt">Table of n, a(n) for n = 1..1000</a>

%H N. J. A. Sloane and others, <a href="/wiki/Sequences_of_RADD_type">Sequences of RADD type</a>, OEIS wiki.

%F Never reaches a cycle (see A117816).

%t NestList[IntegerReverse[#]+20&,1,50] (* Requires Mathematica version 10 or later *) (* _Harvey P. Dale_, Aug 14 2020 *)

%K nonn,base

%O 1,2

%A _N. J. A. Sloane_, May 07 2006