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A117841
Start with 1 and repeatedly reverse the digits and add 10 to get the next term.
3
1, 11, 21, 22, 32, 33, 43, 44, 54, 55, 65, 66, 76, 77, 87, 88, 98, 99, 109, 911, 129, 931, 149, 951, 169, 971, 189, 991, 209, 912, 229, 932, 249, 952, 269, 972, 289, 992, 309, 913, 329, 933, 349, 953, 369, 973, 389, 993, 409, 914, 429, 934, 449, 954, 469, 974, 489, 994, 509
OFFSET
1,2
COMMENTS
This sequence (unlike A117828, say) never cycles.
Comment from Martin Fuller, May 12 2006: The operation can never generate a trailing zero and so is reversible. So it loops only if it returns to the start, which is impossible.
LINKS
Harvey P. Dale and N. J. A. Sloane, Table of n, a(n) for n = 1..20000 (First 1000 terms from Harvey P. Dale)
N. J. A. Sloane and others, Sequences of RADD type, OEIS wiki.
MATHEMATICA
NestList[FromDigits[Reverse[IntegerDigits[#]]]+10&, 1, 60] Harvey P. Dale, May 19 2012
CROSSREFS
KEYWORD
nonn,base
AUTHOR
David Applegate, May 05 2006
STATUS
approved