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A019763
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Decimal expansion of 2*e/3.
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1
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1, 8, 1, 2, 1, 8, 7, 8, 8, 5, 6, 3, 9, 3, 6, 3, 4, 9, 0, 2, 4, 0, 1, 9, 1, 6, 4, 7, 5, 6, 8, 4, 4, 1, 6, 6, 5, 1, 7, 1, 4, 9, 8, 0, 6, 2, 4, 6, 6, 6, 3, 9, 7, 1, 6, 6, 4, 4, 6, 4, 5, 0, 8, 5, 1, 4, 9, 3, 8, 4, 4, 2, 0, 2, 3, 5, 6, 9, 8, 3, 9, 6, 3, 8, 0, 9, 2, 1, 4, 5, 2, 3, 5, 0, 1, 1, 0, 9, 5
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OFFSET
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1,2
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REFERENCES
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Ovidiu Furdui, Limits, Series, and Fractional Part Integrals: Problems in Mathematical Analysis, New York: Springer, 2013. See Problem 3.114, p. 146 and 240-241.
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LINKS
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FORMULA
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Equals Sum_{m>=0} Sum_{k=0..m} (-1)^(m-k) / (k! * 2^(m-k)). - Bernard Schott, Oct 02 2021
Equals Sum_{n,m>=1} n*m/(n+m)! (Furdui, 2013). - Amiram Eldar, Mar 26 2022
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EXAMPLE
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1.81218788563936349024...
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MATHEMATICA
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RealDigits[2*E/3, 10, 100][[1]] (* Amiram Eldar, Mar 26 2022 *)
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PROG
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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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