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A258147
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Decimal expansion of (4 - 3*sqrt(3)/Pi)/6: ratio of the area of a circular segment with central angle 2*Pi/3 and the area of the corresponding circular half-disk.
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3
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3, 9, 1, 0, 0, 2, 2, 1, 8, 9, 5, 5, 7, 7, 0, 6, 4, 1, 9, 1, 1, 0, 0, 3, 4, 1, 7, 5, 1, 0, 1, 8, 1, 9, 4, 5, 9, 6, 7, 9, 7, 3, 4, 2, 6, 4, 8, 3, 3, 4, 6, 3, 4, 0, 2, 6, 6, 9, 8, 3, 6, 5, 6, 5, 2, 1, 1, 5, 1, 5, 1, 4, 9, 3, 2, 0, 3, 1, 7, 6, 9
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OFFSET
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0,1
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COMMENTS
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This is also the ratio of the area of a circular disk (radius R) without an inscribed central rectangle (2*x = R, 2*y = sqrt(3)*R) together with the two opposing circular segments each with central angle Pi/3 and the area Pi*R^2 of the circular disk.
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LINKS
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FORMULA
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2/3 - sqrt(3)/(2*Pi) = 0.39100221895577064191100...
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MATHEMATICA
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RealDigits[2/3 - Sqrt[3]/(2*Pi), 10, 50][[1]] (* G. C. Greubel, Oct 19 2017 *)
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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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