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A130086 a(n) = numerator of Product_{k=1..n} k^mu(k), where mu(k) = A008683(k). 5
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,10

LINKS

Michael De Vlieger, Table of n, a(n) for n = 1..4608

MAPLE

with(numtheory): a:=n->numer(product(k^mobius(k), k=1..n)): seq(a(n), n=1..54); # Emeric Deutsch, May 11 2007

MATHEMATICA

With[{s = Array[#^MoebiusMu@ # &, 47]}, Numerator@ Table[Times @@ Take[s, n], {n, Length@ s}]] (* Michael De Vlieger, Sep 20 2017 *)

CROSSREFS

Cf. A130087, A130088, A130089.

Sequence in context: A248763 A233585 A103512 * A084731 A066180 A123487

Adjacent sequences:  A130083 A130084 A130085 * A130087 A130088 A130089

KEYWORD

frac,nonn

AUTHOR

Leroy Quet, May 06 2007

EXTENSIONS

More terms from Emeric Deutsch, May 11 2007

STATUS

approved

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Last modified November 19 22:34 EST 2019. Contains 329323 sequences. (Running on oeis4.)