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Search: id:A118532
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| A118532 |
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Start with 1 and repeatedly reverse the digits and add 15 to get the next term. |
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+0
3
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| 1, 16, 76, 82, 43, 49, 109, 916, 634, 451, 169, 976, 694, 511, 130, 46, 79, 112, 226, 637, 751, 172, 286, 697, 811, 133, 346, 658, 871, 193, 406, 619, 931, 154, 466, 679, 991, 214, 427, 739, 952, 274, 487, 799, 1012, 2116, 6127, 7231, 1342, 2446
(list; graph; listen)
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OFFSET
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1,2
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COMMENT
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This sequence never cycles.
The plot (see the Noe link) shows 2774 terms of this sequence. It has a regular structure, which continues at higher decades. - T. D. Noe (noe(AT)sspectra.com), May 10 2006
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LINKS
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T. D. Noe, Table of n, a(n) for n = 1..2774
T. D. Noe, Plot of A118532
N. J. A. Sloane, Sequences of RADD type
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FORMULA
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This sequence never cycles. After a while, the pattern of length changes settles into an increasing pattern: 10^(4m)+3, 10^(4m+1)+3, 10^(4m+2)+12, 10^(4m+3)+12, 10^(4(m+1))+3, ... The key is that every two steps adds 15 at each end, unless there is a carry across the middle or a trailing 0. This allows many steps to be carried out in a single operation. - Martin Fuller (martin_n_fuller(AT)btinternet.com), May 12 2006
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CROSSREFS
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Cf. A117828, A117816, A117817.
Sequence in context: A126403 A103111 A118862 this_sequence A007834 A082966 A061995
Adjacent sequences: A118529 A118530 A118531 this_sequence A118533 A118534 A118535
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KEYWORD
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nonn,base
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AUTHOR
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njas, May 06 2006
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