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Search: id:A066880
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| A066880 |
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Biased numbers: n such that all terms of the sequence f(n), f(f(n)), f(f(f(n))), ..., 1, where f(k) = Floor(k/2), are odd. |
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2
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| 2, 3, 6, 7, 14, 15, 30, 31, 62, 63, 126, 127, 254, 255, 510, 511, 1022, 1023, 2046, 2047, 4094, 4095, 8190, 8191, 16382, 16383, 32766, 32767, 65534, 65535, 131070, 131071, 262142, 262143, 524286, 524287, 1048574, 1048575, 2097150, 2097151, 4194302
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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It should not be hard to prove that this sequence consists of pairs 2^k - 2, 2^k - 1, where k > 2.
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EXAMPLE
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The sequence corresponding to 14 is 7, 3, 1, all of whose terms are odd. So 14 is a term of the sequence.
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CROSSREFS
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Adjacent sequences: A066877 A066878 A066879 this_sequence A066881 A066882 A066883
Sequence in context: A018511 A092482 A075427 this_sequence A075426 A018606 A117087
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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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More terms from Larry Reeves (larryr(AT)acm.org), Jun 11 2002
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