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A093598
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Denominator of Sum_{k in A026424} 1/k^(2n).
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1
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20, 1260, 225225, 137837700, 49104680625, 3277766894527125, 61902833536293750, 396627372338514817500, 7794458831536571762427234375, 2289686345687357378035370971875, 146008313505589229344287856968750
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OFFSET
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1,1
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LINKS
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FORMULA
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Denominator of (zeta(2n)^2-zeta(4n))/(2zeta(2n)).
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EXAMPLE
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Pi^2/20, Pi^4/1260, (4*Pi^6)/225225, (59*Pi^8)/137837700, ...
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CROSSREFS
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KEYWORD
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nonn,frac
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AUTHOR
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STATUS
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approved
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