A258148 - OEIS

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

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

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OFFSET

-1,1

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 = 1..4999

Index entries for transcendental numbers

FORMULA

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: A348731 A346590 A100554 * A193013 A220607 A348607