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A258815
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Decimal expansion of the Dirichlet beta function of 8.
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9
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9, 9, 9, 8, 4, 9, 9, 9, 0, 2, 4, 6, 8, 2, 9, 6, 5, 6, 3, 3, 8, 0, 6, 7, 0, 5, 9, 2, 4, 0, 4, 6, 3, 7, 8, 1, 4, 7, 6, 0, 0, 7, 4, 3, 3, 0, 0, 7, 4, 2, 8, 0, 6, 9, 7, 2, 4, 9, 8, 7, 4, 2, 9, 2, 4, 0, 6, 7, 1, 1, 5, 9, 3, 2, 5, 0, 7, 1, 7, 3, 5, 1, 1, 2, 6, 4, 2, 7, 0, 5, 0, 8, 1, 3, 5, 7, 0, 4, 2, 6, 2, 1, 2, 8, 3
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OFFSET
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0,1
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LINKS
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FORMULA
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beta(8) = Sum_{n>=0} (-1)^n/(2n+1)^8 = (zeta(8, 1/4) - zeta(8, 3/4))/65536 = (PolyGamma(7, 1/4) - PolyGamma(7, 3/4))/330301440.
Equals ClausenFunction(8, Pi/2).
Equals Product_{p prime >= 3} (1 - (-1)^((p-1)/2)/p^8)^(-1). - Amiram Eldar, Nov 06 2023
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EXAMPLE
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0.99984999024682965633806705924046378147600743300742806972498742924...
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MATHEMATICA
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RealDigits[DirichletBeta[8], 10, 102] // First
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PROG
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(PARI) (zetahurwitz(8, 1/4)-zetahurwitz(8, 3/4))*(1/4)^8 \\ Hugo Pfoertner, Feb 07 2020
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CROSSREFS
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KEYWORD
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AUTHOR
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STATUS
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approved
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