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A283743
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Decimal expansion of Ei(1)/e, where Ei is the exponential integral function.
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2
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6, 9, 7, 1, 7, 4, 8, 8, 3, 2, 3, 5, 0, 6, 6, 0, 6, 8, 7, 6, 5, 4, 7, 8, 6, 8, 1, 9, 1, 9, 5, 5, 1, 5, 9, 5, 3, 1, 7, 1, 7, 5, 4, 3, 0, 9, 5, 4, 3, 6, 9, 5, 1, 7, 3, 2, 0, 0, 5, 4, 8, 0, 7, 7, 8, 9, 4, 5, 4, 1, 1, 5, 1, 9, 5, 1, 4, 4, 2, 6, 9, 6, 2, 9, 1, 0, 0, 5, 3, 0, 3, 0, 3, 3, 3, 9, 1, 1, 4, 0, 0, 6
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OFFSET
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0,1
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COMMENTS
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Can be considered the value of the divergent series -0! - 1! - 2! - ... ; see Lagarias reference Section 2.5. - Harry Richman, Jun 14 2020.
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LINKS
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FORMULA
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The real part of subfactorial(-1), that is the real part of Gamma(0,-1)/e.
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EXAMPLE
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0.6971748832350660687654786819195515953171754309543695173200548...
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MATHEMATICA
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RealDigits[ExpIntegralEi[1]/E, 10, 102][[1]]
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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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