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Search: id:A133684
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| 0, 1, 1, 0, 1, 2, 3, 2, 5, 6, 11, 10, 21, 22, 43, 42, 85, 86, 171, 170, 341, 342, 683, 682
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OFFSET
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0,6
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COMMENT
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a(4p)+a(4p+1)=a(4p+2); a(n)+a(n+2)=1, 1, 2, 2, 4, 4, 8, 8, ... =A016116.
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FORMULA
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O.g.f.: x-x^2(1+2x^3)/[(2x^2-1)(x^2+1)] . - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Feb 23 2008
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CROSSREFS
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Sequence in context: A110500 A135875 A097448 this_sequence A025473 A092556 A092550
Adjacent sequences: A133681 A133682 A133683 this_sequence A133685 A133686 A133687
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KEYWORD
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nonn
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AUTHOR
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Paul Curtz (bpcrtz(AT)free.fr), Jan 04 2008
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