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A068565
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Denominators of Sum_{k=1..n} 1/(k * 2^k).
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2
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2, 8, 3, 192, 960, 1920, 1680, 215040, 645120, 64512, 1419264, 11354112, 147603456, 295206912, 46126080, 47233105920, 802962800640, 802962800640, 15256293212160, 61025172848640, 61025172848640, 122050345697280
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OFFSET
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1,1
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COMMENTS
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Sum_{k>=1} 1/(k * 2^k) = log(2).
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LINKS
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PROG
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(PARI) a(n) = denominator(sum(k=1, n, 1/(k * 2^k))); \\ Michel Marcus, Jun 26 2019
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CROSSREFS
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KEYWORD
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easy,frac,nonn
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AUTHOR
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STATUS
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approved
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