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Search: id:A032937
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| A032937 |
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Numbers n such that base 2 representation Sum{d(i)*2^i: i=0,1,...,m} has d(i)=0 for all odd i. |
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+0
2
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| 1, 2, 4, 5, 8, 10, 16, 17, 20, 21, 32, 34, 40, 42, 64, 65, 68, 69, 80, 81, 84, 85, 128, 130, 136, 138, 160, 162, 168, 170, 256, 257, 260, 261, 272, 273, 276, 277, 320, 321, 324, 325, 336, 337, 340, 341, 512, 514, 520, 522, 544, 546
(list; graph; listen)
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OFFSET
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1,2
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COMMENT
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Or, base 2 representation Sum{d(i)*2^i: i=0,1,...,m} has even d(i) for all odd i.
Union of A000695 and 2*A000695. - R. Stephan, May 05 2004
Essentially the same as A126684. - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jun 15 2008
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PROGRAM
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(PARI) for(n=1, 350, b=binary(n):l=length(b); if(sum(i=1, floor(l/2), component(b, 2*i))==0, print1(n, ", ")))
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CROSSREFS
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Cf. A033053.
Sequence in context: A050539 A039895 A105425 this_sequence A126684 A089653 A114652
Adjacent sequences: A032934 A032935 A032936 this_sequence A032938 A032939 A032940
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KEYWORD
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nonn,base
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AUTHOR
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Clark Kimberling (ck6(AT)evansville.edu)
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