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Search: id:A130552
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| A130552 |
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Denominators of partial sums for a series of (4/5)*Zeta(3). |
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+0
3
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| 1, 24, 1080, 60480, 1512000, 7128000, 31783752000, 254270016000, 38903312448000, 67196630592000, 89438715317952000, 9308101594176000, 347648286440879424000, 347648286440879424000, 50409001533927516480000
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OFFSET
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1,2
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COMMENT
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For the rationals r(n):=2*sum(((-1)^(j-1))/((j^3)*binomial(2*j,j)),j=1..n), n>=1, the van der Poorten reference and a W. Lang link see A130551.
Numerators are given in A130551.
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FORMULA
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a(n)=denominator(r(n)), n>=1.
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CROSSREFS
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Sequence in context: A112011 A112010 A046906 this_sequence A114051 A010562 A080775
Adjacent sequences: A130549 A130550 A130551 this_sequence A130553 A130554 A130555
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KEYWORD
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nonn,frac,easy
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AUTHOR
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Wolfdieter Lang (wolfdieter.lang(AT)physik.uni-karlsruhe.de) Jul 13 2007
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