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Search: id:A066879
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| A066879 |
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Neutral numbers: n such that there are as many odd as even terms in the orbit f(n), f(f(n)), f(f(f(n))), ..., 1, where f(k) = Floor(k/2). |
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3
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| 4, 5, 18, 19, 20, 21, 24, 25, 70, 71, 74, 75, 76, 77, 82, 83, 84, 85, 88, 89, 98, 99, 100, 101, 104, 105, 112, 113, 270, 271, 278, 279, 282, 283, 284, 285, 294, 295, 298, 299, 300, 301, 306, 307, 308, 309, 312, 313, 326, 327, 330, 331, 332, 333, 338, 339, 340
(list; graph; listen)
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OFFSET
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1,1
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EXAMPLE
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The orbit corresponding to 18 is 9, 4, 2, 1, which has an equal number (i.e. 2) of odd and even terms. So 18 is a term of the sequence.
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CROSSREFS
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Sequence in context: A119997 A010361 A060289 this_sequence A134750 A051949 A026902
Adjacent sequences: A066876 A066877 A066878 this_sequence A066880 A066881 A066882
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KEYWORD
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easy,nonn
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AUTHOR
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Joseph L. Pe (joseph_l_pe(AT)hotmail.com), Jan 21 2002
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EXTENSIONS
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Extended and edited by John W. Layman (layman(AT)math.vt.edu), Jan 30 2002
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