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Search: id:A139706
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| A139706 |
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Take n in binary. Rotate the binary digits to the right until a 1 once again appears as the leftmost digit. Convert back into decimal for a(n). |
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+0
3
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| 1, 2, 3, 4, 6, 5, 7, 8, 12, 10, 13, 9, 14, 11, 15, 16, 24, 20, 25, 18, 26, 21, 27, 17, 28, 22, 29, 19, 30, 23, 31, 32, 48, 40, 49, 36, 50, 41, 51, 34, 52, 42, 53, 37, 54, 43, 55, 33, 56, 44, 57, 38, 58, 45, 59, 35, 60, 46, 61, 39, 62, 47, 63, 64, 96, 80, 97, 72, 98, 81, 99, 68
(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 written in binary is A139707.
This is a permutation of the positive integers. A139708 is the inverse permutation.
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LINKS
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Leroy Quet, Home Page (listed in lieu of email address)
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MAPLE
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A139706 := proc(n) local a; a := ListTools[Rotate](convert(n, base, 2), 1) ; while op(-1, a) = 0 do a := ListTools[Rotate](a, 1) ; od: add(op(i, a)*2^(i-1), i=1..nops(a)) : end: seq(A139706(n), n=1..100) ; - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), May 04 2008
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CROSSREFS
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Cf. A139707, A139708.
Sequence in context: A080542 A072758 A104464 this_sequence A139708 A059893 A132284
Adjacent sequences: A139703 A139704 A139705 this_sequence A139707 A139708 A139709
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KEYWORD
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nonn,base
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AUTHOR
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Leroy Quet Apr 30 2008
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EXTENSIONS
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More terms from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), May 04 2008
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