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Search: id:A117828
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| A117828 |
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Start with 1 and repeatedly reverse the digits and add 4 to get the next term. |
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+0
79
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| 1, 5, 9, 13, 35, 57, 79, 101, 105, 505, 509, 909, 913, 323, 327, 727, 731, 141, 145, 545, 549, 949, 953, 363, 367, 767, 771, 181, 185, 585, 589, 989, 993, 403, 308, 807, 712, 221, 126, 625, 530, 39, 97, 83, 42, 28, 86, 72, 31, 17, 75, 61, 20, 6, 10, 5, 9, 13, 35, 57, 79, 101, 105, 505, 509, 909, 913, 323, 327, 727, 731
(list; graph; listen)
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OFFSET
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1,2
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LINKS
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N. J. A. Sloane, Sequences of RADD type
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FORMULA
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After one step enters a cycle of length 54: see A117827, A117830.
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MAPLE
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read transforms; t1:=[1]; for n from 1 to 80 do t1:=[op(t1), 4+digrev(t1[n])]; od: (N. J. A. Sloane)
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MATHEMATICA
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f[n_] := 4 + FromDigits@ Reverse@ IntegerDigits@n; NestList[ f@# &, 1, 57] (* and *)
(* to view the cycle *) NestWhileList[ f@# &, 1, UnsameQ, All] (from Robert G. Wilson v (rgwv(at)rgwv.com), May 09 2006)
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CROSSREFS
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Cf. A117827, A117829, A117830.
Sequence in context: A024728 A024950 A118837 this_sequence A117830 A061516 A146135
Adjacent sequences: A117825 A117826 A117827 this_sequence A117829 A117830 A117831
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KEYWORD
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nonn,base
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AUTHOR
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Luc Stevens (lms022(AT)yahoo.com), Apr 06 2006
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