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A057867
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Denominator of coefficient of Pi^n in Ramanujan-like series for Zeta[4n+3].
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4
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OFFSET
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1,1
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COMMENTS
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REFERENCES
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E. C. Titchmarsh, The Theory of Functions, 2nd ed., Oxford Univ. Press, 1939, p. 135.
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LINKS
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EXAMPLE
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Sum_{k>0} 1/(tanh(k*Pi)k^3) = Pi^3*7/180;
Sum_{k>0} 1/(tanh(k*Pi)k^7) = Pi^7*19/56700.
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MATHEMATICA
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Denominator[Table[2^(k-1)/(k+1)! Sum[(-1)^(n-1)Binomial[k+1, 2n]BernoulliB[k+1-2n]BernoulliB[2n], {n, 0, (k+1)/2}], {k, 3, 50, 4}]]
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CROSSREFS
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KEYWORD
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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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