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A336686
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Decimal expansion of Sum_{k>=0} 1/(k!)!.
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3
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2, 5, 0, 1, 3, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 9, 0, 5, 0, 0, 6, 2, 6, 4, 5, 9, 9, 8, 5, 0, 0, 7, 2, 3, 7, 9, 3, 7, 6, 0, 2, 1, 9, 3, 6, 9, 0, 0, 6, 0, 6, 9, 0, 2, 1, 3, 6, 1, 4, 9, 9, 1, 4, 9, 6, 1, 1, 6, 8, 6, 2, 4, 1, 8, 1, 7, 8, 9, 1, 9, 8, 9, 9, 3, 3, 9, 4, 3, 7, 4, 1, 5, 7, 4, 4, 1
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OFFSET
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1,1
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COMMENTS
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The sum has 18 8's in a row within the first 23 decimal places.
1801/720 approximates this constant to 23 significant digits.
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LINKS
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EXAMPLE
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2.5013888888888888888888905006...
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MAPLE
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evalf(sum(1/(k!)!, k=0..infinity), 112); # Alois P. Heinz, Nov 20 2020
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MATHEMATICA
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RealDigits[Sum[1/(k!)!, {k, 0, 4}], 10, 100][[1]] (* Amiram Eldar, Nov 21 2020 *)
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PROG
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(PARI) suminf(k=0, 1/(k!)!)
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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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