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A242978
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Decimal expansion of Efimov's scaling constant.
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0
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2, 2, 6, 9, 4, 3, 8, 2, 5, 9, 5, 3, 6, 6, 6, 9, 5, 1, 9, 2, 8, 6, 0, 2, 1, 7, 1, 3, 6, 9, 3, 3, 3, 7, 6, 5, 1, 0, 2, 9, 8, 9, 6, 8, 9, 0, 1, 3, 0, 3, 1, 9, 1, 3, 6, 4, 8, 2, 6, 0, 8, 9, 4, 1, 6, 4, 2, 7, 1, 7, 1, 2, 9, 5, 6, 9, 8, 3, 0, 4, 2, 9, 0, 4, 9, 2, 5
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OFFSET
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2,1
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COMMENTS
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Usually reported as 22.7.
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LINKS
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MATHEMATICA
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RealDigits[E^(Pi/x)/.FindRoot[x*Cosh[Pi*x/2] - 8*Sinh[Pi*x/6]/Sqrt[3], {x, 2}, WorkingPrecision->105]][[1]] (* Vaclav Kotesovec, May 28 2014 *)
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PROG
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(PARI) exp(Pi/solve(x=1, 2, x*cosh(Pi*x/2)-8*sinh(Pi*x/6)/sqrt(3)))
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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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