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 A118535 Start with 1 and repeatedly reverse the digits and add 20 to get the next term. 2
 1, 21, 32, 43, 54, 65, 76, 87, 98, 109, 921, 149, 961, 189, 1001, 1021, 1221, 1241, 1441, 1461, 1661, 1681, 1881, 1901, 1111, 1131, 1331, 1351, 1551, 1571, 1771, 1791, 1991, 2011, 1122, 2231, 1342, 2451, 1562, 2671, 1782, 2891, 2002, 2022 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Harvey P. Dale, Table of n, a(n) for n = 1..1000 N. J. A. Sloane and others, Sequences of RADD type, OEIS wiki. FORMULA Never reaches a cycle (see A117816). MATHEMATICA NestList[IntegerReverse[#]+20&, 1, 50] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Aug 14 2020 *) CROSSREFS Sequence in context: A168004 A118866 A168005 * A127423 A319477 A035137 Adjacent sequences:  A118532 A118533 A118534 * A118536 A118537 A118538 KEYWORD nonn,base AUTHOR N. J. A. Sloane, May 07 2006 STATUS approved

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Last modified November 27 10:12 EST 2020. Contains 338679 sequences. (Running on oeis4.)