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A022809
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a(n) = F(n+3) + c(n) where F(k) is k-th Fibonacci number and c(n) is n-th number that is 1 or 2 or is not a Fibonacci number.
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1
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4, 7, 12, 19, 28, 43, 65, 100, 156, 247, 392, 626, 1004, 1615, 2603, 4201, 6787, 10969, 17735, 28682, 46394, 75052, 121421, 196447, 317841, 514260, 832072, 1346302, 2178344, 3524614, 5702924, 9227503
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OFFSET
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1,1
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LINKS
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MATHEMATICA
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With[{nn=40}, fibs=Fibonacci[Range[nn]]; nonf=Take[Join[{1, 2}, Complement[Range[nn+Length[fibs]], fibs]], Length[fibs]-3]; Total/@Thread[{Drop[fibs, 3], nonf}]] (* Harvey P. Dale, Sep 30 2011 *)
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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