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A075267
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Denominator of the coefficient of x^n in log(-log(1-x)/x).
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8
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2, 24, 8, 2880, 288, 362880, 17280, 29030400, 89600, 958003200, 17418240, 31384184832000, 402361344000, 62768369664000, 295206912, 512189896458240000, 342372925440000, 919636959090769920000, 5377993912811520000, 674400436666564608000000, 89903156428800000
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OFFSET
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1,1
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LINKS
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MAPLE
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S:= series(log(-log(1-x)/x), x, 51):
seq(denom(coeff(S, x, j)), j=1..50); # Robert Israel, May 17 2016
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MATHEMATICA
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Denominator[ CoefficientList[ Series[ Log[ -Log[1 - x]/x], {x, 0, 18}], x]]
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PROG
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(Magma) m:=25; R<x>:=PowerSeriesRing(Rationals(), m); b:=Coefficients(R!( Log(-Log(1-x)/x) )); [Denominator(b[n]): n in [1..m-2]]; // G. C. Greubel, Oct 29 2018
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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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