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A028892
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a(n) = Fibonacci(n) - 2^(floor(n/2)).
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1
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-1, 0, -1, 0, -1, 1, 0, 5, 5, 18, 23, 57, 80, 169, 249, 482, 731, 1341, 2072, 3669, 5741, 9922, 15663, 26609, 42272, 70929, 113201, 188226, 301427, 497845, 799272, 1313501, 2112773, 3459042, 5571815, 9096393
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OFFSET
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0,8
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LINKS
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FORMULA
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Empirical G.f.: -(x^3-2*x^2-x+1)/((x^2+x-1)*(2*x^2-1)). - Colin Barker, Sep 21 2012
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MATHEMATICA
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Table[Fibonacci[n] - 2^(Floor[n/2]), {n, 0, 50}] (* G. C. Greubel, Aug 19 2017 *)
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PROG
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(PARI) for(n=0, 50, print1(fibonacci(n) - 2^(floor(n/2)), ", ")) \\ G. C. Greubel, Aug 19 2017
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CROSSREFS
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KEYWORD
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sign
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AUTHOR
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STATUS
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approved
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