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Search: id:A055938
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| A055938 |
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Integers not generated by b(n) = b( [n/2] ) + n ( cf. A005187). |
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+0
14
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| 2, 5, 6, 9, 12, 13, 14, 17, 20, 21, 24, 27, 28, 29, 30, 33, 36, 37, 40, 43, 44, 45, 48, 51, 52, 55, 58, 59, 60, 61, 62, 65, 68, 69, 72, 75, 76, 77, 80, 83, 84, 87, 90, 91, 92, 93, 96, 99, 100, 103, 106, 107, 108, 111, 114, 115, 118, 121, 122, 123, 124, 125, 126, 129
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Note that the lengths of the consecutive runs in a(n) form sequence A001511.
Integers that are not a sum of distinct integers of the form 2^k-1. - Vladeta Jovovic (vladeta(AT)eunet.rs), Jan 24 2003
Also n! never ends in this many 0's in base 2 - Carl R. White (oeisfan(AT)phodd.net), Jan 21 2008
A079559(a(n)) = 0. [From Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Mar 18 2009]
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LINKS
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T. D. Noe, Table of n, a(n) for n=1..1000
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EXAMPLE
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Since A005187 begins 0 1 3 4 7 8 10 11 15 16 18 19 22 23 25 26 31... this sequence begins 2 5 6 9 12 13 14 17 20 21
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MATHEMATICA
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a[0] = 0; a[1] = 1; a[n_Integer] := a[Floor[n/2]] + n; b = {}; Do[ b = Append[b, a[n]], {n, 0, 105}]; c =Table[n, {n, 0, 200}]; Complement[c, b]
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CROSSREFS
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Complement of A005187. Cf. A001511, A010061 (integers that are not a sum of distinct integers of the form 2^k+1).
Sequence in context: A046160 A033161 A024516 this_sequence A047323 A033292 A090500
Adjacent sequences: A055935 A055936 A055937 this_sequence A055939 A055940 A055941
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KEYWORD
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easy,nice,nonn
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AUTHOR
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Alford Arnold (Alford1940(AT)aol.com), Jul 21 2000
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EXTENSIONS
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More terms from Robert G. Wilson v (rgwv(AT)rgwv.com), Jul 24 2000
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