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Search: id:A139708
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| A139708 |
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Take n in binary. Rotate the binary digits to the left 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, 14, 9, 11, 13, 15, 16, 24, 20, 28, 18, 22, 26, 30, 17, 19, 21, 23, 25, 27, 29, 31, 32, 48, 40, 56, 36, 44, 52, 60, 34, 38, 42, 46, 50, 54, 58, 62, 33, 35, 37, 39, 41, 43, 45, 47, 49, 51, 53, 55, 57, 59, 61, 63, 64, 96, 80, 112, 72, 88, 104, 120
(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 A139709.
This is a permutation of the positive integers. A139706 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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A139708 := 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(A139708(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. A139706, A139709.
Sequence in context: A072758 A104464 A139706 this_sequence A059893 A132284 A131966
Adjacent sequences: A139705 A139706 A139707 this_sequence A139709 A139710 A139711
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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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