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A038572
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a(n) = n rotated one binary place to the right.
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9
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0, 1, 1, 3, 2, 6, 3, 7, 4, 12, 5, 13, 6, 14, 7, 15, 8, 24, 9, 25, 10, 26, 11, 27, 12, 28, 13, 29, 14, 30, 15, 31, 16, 48, 17, 49, 18, 50, 19, 51, 20, 52, 21, 53, 22, 54, 23, 55, 24, 56, 25, 57, 26, 58, 27, 59, 28, 60, 29, 61, 30, 62, 31, 63, 32, 96, 33, 97, 34, 98, 35, 99, 36, 100
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,4
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COMMENTS
| Iterating a(n), a(a(n)), ... eventually leads to 2^A000120(n) - 1. [From Franklin T. Adams-Watters (FrankTAW(AT)Netscape.net), Apr 09 2010]
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LINKS
| T. D. Noe, Table of n, a(n) for n=0..1023
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FORMULA
| a(n) = A053645(n) * A000035(n) + A004526(n) = most significant bit(n) * least significant bit(n) + floor(n/2).
a(0)=0, a(1)=1, a(2n) = n, a(2n+1) = 2a(n) + 2a(n+1) - n. - Ralf Stephan (ralf(AT)ark.in-berlin.de), Oct 24 2003
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MATHEMATICA
| Table[ FromDigits[ RotateRight[ IntegerDigits[n, 2]], 2], {n, 0, 80}] (from Robert G. Wilson v)
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CROSSREFS
| Cf. A006257, A088146.
Sequence in context: A071018 A144559 A155114 * A060992 A064455 A141619
Adjacent sequences: A038569 A038570 A038571 * A038573 A038574 A038575
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KEYWORD
| easy,nonn,nice
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AUTHOR
| Marc LeBrun (mlb(AT)well.com)
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