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A222392
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Decimal expansion of sum(1/Gamma(n/2), n>=1).
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2
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5, 5, 7, 3, 1, 6, 9, 6, 6, 4, 3, 1, 0, 0, 3, 9, 7, 5, 3, 2, 5, 7, 9, 0, 4, 0, 4, 9, 7, 7, 5, 5, 8, 2, 4, 0, 0, 5, 3, 8, 3, 8, 5, 3, 1, 3, 5, 6, 4, 6, 6, 5, 3, 4, 3, 0, 3, 2, 4, 8, 1, 2, 0, 6, 4, 1, 8, 2, 9, 0, 3, 0, 7, 3, 2, 8, 3, 4, 5, 3, 5, 8, 4, 2, 2, 4, 5
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OFFSET
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1,1
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LINKS
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Vincenzo Librandi, Table of n, a(n) for n = 1..5000
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FORMULA
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Equals (1+erf(1))*e+1/sqrt(Pi), where erf is the error function (see A099286).
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EXAMPLE
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5.57316966431003975325790404977558240053838531356466534303248120641829030...
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MATHEMATICA
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RealDigits[(1 + Erf[1]) E + 1/Sqrt[Pi], 10, 90][[1]]
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CROSSREFS
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Cf. A222391.
Cf. A001113, sum(1/Gamma(n), n>=1).
Sequence in context: A274030 A061382 A113272 * A049471 A049789 A234473
Adjacent sequences: A222389 A222390 A222391 * A222393 A222394 A222395
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KEYWORD
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nonn,cons
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AUTHOR
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Bruno Berselli, Mar 19 2013
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STATUS
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approved
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