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 A118866 Start with 1 and repeatedly place the first digit at the end of the number and add 20. 0
 1, 21, 32, 43, 54, 65, 76, 87, 98, 109, 111, 131, 331, 333, 353, 553, 555, 575, 775, 777, 797, 997, 999, 1019, 211, 132, 341, 433, 354, 563, 655, 576, 785, 877, 798, 1007, 91, 39, 113, 151, 531, 335, 373, 753, 557, 595, 975, 779, 817, 198, 1001, 31, 33, 53, 55, 75 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS After 24 steps the sequence enters a cycle of length 36. LINKS MATHEMATICA NestList[FromDigits[RotateLeft[IntegerDigits[#]]]+20&, 1, 60] (* Harvey P. Dale, Jun 21 2017 *) CROSSREFS Sequence in context: A095994 A168001 A168004 * A168005 A118535 A127423 Adjacent sequences:  A118863 A118864 A118865 * A118867 A118868 A118869 KEYWORD base,nonn AUTHOR Luc Stevens (lms022(AT)yahoo.com), May 24 2006 STATUS approved

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Last modified May 19 22:32 EDT 2019. Contains 323411 sequences. (Running on oeis4.)