A118535 Start with 1 and repeatedly reverse the digits and add 20 to get the next term.

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

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