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A130086
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a(n) = numerator of Product_{k=1..n} k^mu(k), where mu(k) = A008683(k).
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5
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1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 4, 60, 60, 60, 60, 60, 60, 1260, 2520, 2520, 2520, 2520, 5040, 5040, 5040, 5040, 168, 168, 168, 5544, 11088, 388080, 388080, 388080, 776160, 30270240, 30270240, 30270240, 720720, 720720, 720720, 720720, 1441440, 1441440
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OFFSET
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1,10
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LINKS
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MAPLE
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with(numtheory): a:=n->numer(product(k^mobius(k), k=1..n)): seq(a(n), n=1..54); # Emeric Deutsch, May 11 2007
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MATHEMATICA
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With[{s = Array[#^MoebiusMu@ # &, 47]}, Numerator@ Table[Times @@ Take[s, n], {n, Length@ s}]] (* Michael De Vlieger, Sep 20 2017 *)
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CROSSREFS
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KEYWORD
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frac,nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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