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Search: id:A097666
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| A097666 |
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Decimal expansion of the constant 4*exp(psi(3/4)+EulerGamma), where EulerGamma is the Euler-Mascheroni constant (A001620). |
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+0
3
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| 2, 4, 0, 5, 2, 3, 8, 6, 9, 0, 4, 8, 2, 6, 7, 5, 8, 2, 7, 7, 3, 6, 5, 1, 7, 8, 3, 3, 3, 5, 1, 9, 1, 6, 5, 6, 3, 1, 9, 5, 0, 8, 5, 4, 3, 7, 3, 3, 2, 2, 6, 7, 4, 7, 0, 0, 1, 0, 4, 0, 7, 7, 4, 4, 6, 2, 1, 2, 7, 5, 9, 5, 2, 4, 4, 5, 7, 9, 1, 0, 6, 8, 3, 7, 4, 3, 5, 2, 3, 8, 3, 2, 9, 1, 9, 4, 1, 6, 7, 7, 3, 2, 8, 6, 4
(list; cons; graph; listen)
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OFFSET
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1,1
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COMMENT
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This constant appears in Benoit Cloitre's generalized Euler-Gauss formula for the Gamma function (see Cloitre link) and is involved in the exact determination of asymptotic limits of certain order-4 linear recursions with varying coefficients (see A097679 for example).
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REFERENCES
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A. M. Odlyzko, Linear recurrences with varying coefficients, in Handbook of Combinatorics, Vol. 2, R. L. Graham, M. Grotschel, and L. Lovasz, eds., Elsevier, Amsterdam, 1995, pp. 1135-1138.
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LINKS
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Benoit Cloitre, On a generalization of Euler-Gauss formula for the Gamma function, pre-print 2004.
Xavier Gourdon and Pascal Sebah, Introduction to the Gamma Function.
Andrew Odlyzko, Asymptotic enumeration methods, in Handbook of Combinatorics, vol. 2, 1995, pp. 1063-1229.
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FORMULA
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c = 1/2*exp(Pi/2)
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EXAMPLE
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c = 2.40523869048267582773651783335191656319508543733226747001040...
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MATHEMATICA
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RealDigits[1/2*E^(Pi/2), 10, 105][[1]] (from Robert G. Wilson v Aug 27 2004)
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PROGRAM
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(PARI) 4*exp(psi(3/4)+Euler)
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CROSSREFS
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Cf. A097663-A097665, A097667-A097676.
Adjacent sequences: A097663 A097664 A097665 this_sequence A097667 A097668 A097669
Sequence in context: A086932 A079985 A059226 this_sequence A002652 A070676 A068451
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KEYWORD
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cons,nonn
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AUTHOR
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Paul D. Hanna (pauldhanna(AT)juno.com), Aug 25 2004
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EXTENSIONS
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More terms from Robert G. Wilson v (rgwv(AT)rgwv.com), Aug 27 2004
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