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2, 6, 9, 5, 9, 5, 8, 9, 3, 2, 3, 8, 8, 9, 3, 8, 6, 8, 3, 2, 8, 4, 3, 0, 8, 0, 1, 6, 6, 6, 7, 3, 6, 8, 9, 6, 6, 9, 2, 5, 7, 7, 8, 5, 9, 6, 3, 1, 7, 0, 4, 8, 7, 2, 4, 7, 5, 2, 0, 0, 1, 5, 7, 9, 2, 0, 2, 0, 9, 2, 8, 5, 7, 1, 6, 7, 0, 7, 5, 0, 4, 3, 9, 4, 0, 9, 9, 1, 4, 3, 4, 9, 5, 5, 5, 5, 4, 2, 2, 5
(list;
constant;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,1
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COMMENTS
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This constant is irrational (Erdős and Straus, 1976).
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LINKS
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EXAMPLE
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2.69595893238893868328430801666736896692577859631704...
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MATHEMATICA
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RealDigits[Sum[DivisorSigma[0, n]/LCM @@ Range[n], {n, 1, 300}], 10, 100][[1]]
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PROG
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(PARI) suminf(k=1, numdiv(k)/lcm([1..k])) \\ Michel Marcus, Jul 16 2021
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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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