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A258148 Decimal expansion of (2 - 3*sqrt(3)/Pi)/6: ratio of the area of a circular segment with central angle Pi/3 and the area of the corresponding circular half-disk 3
5, 7, 6, 6, 8, 8, 8, 5, 6, 2, 2, 4, 3, 7, 3, 0, 8, 5, 7, 7, 6, 7, 0, 0, 8, 4, 1, 7, 6, 8, 4, 8, 6, 1, 2, 6, 3, 4, 6, 4, 0, 0, 9, 3, 1, 5, 0, 0, 1, 3, 0, 0, 6, 9, 3, 3, 6, 5, 0, 3, 2, 3, 1, 8, 7, 8, 1, 8, 1, 8, 1, 5, 9, 8, 6, 9, 8, 4, 3, 5, 9 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

See the comment on A258146.

This is also the ratio of the area of a circular disk (radius R) without an inscribed central rectangle (2*x = sqrt(3)*R, 2*y = R) together with the two opposing circular segments each with central angle 2*Pi/3 and the area Pi*R^2 of the circular disk.

LINKS

G. C. Greubel, Table of n, a(n) for n = 0..5000

FORMULA

1/3 - sqrt(3)/(2*Pi) = 0.05766888562243730857767...

MATHEMATICA

RealDigits[1/3 - Sqrt[3]/(2*Pi), 10, 50][[1]] (* G. C. Greubel, Oct 19 2017 *)

PROG

(PARI) 1/3 - sqrt(3)/(2*Pi) \\ Michel Marcus, Oct 19 2017

CROSSREFS

Cf. A258146, A258147.

Sequence in context: A195444 A114603 A100554 * A193013 A220607 A200097

Adjacent sequences:  A258145 A258146 A258147 * A258149 A258150 A258151

KEYWORD

nonn,cons,easy

AUTHOR

Wolfdieter Lang, Jun 01 2015

STATUS

approved

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Last modified October 18 04:46 EDT 2019. Contains 328145 sequences. (Running on oeis4.)