A130203 Decimal expansion of the mean distance between two points picked at random in a half-disk.

7, 0, 6, 0, 5, 3, 4, 0, 9, 3, 8, 9, 8, 5, 2, 1, 1, 9, 8, 1, 9, 3, 6, 9, 5, 6, 0, 7, 0, 7, 1, 3, 3, 1, 5, 2, 7, 2, 3, 8, 0, 6, 6, 6, 3, 2, 5, 7, 7, 3, 4, 7, 0, 6, 4, 8, 6, 5, 2, 2, 5, 5, 9, 4, 5, 3, 6, 4, 9, 2, 3, 7, 8, 5, 0, 0, 8, 4, 3, 5, 8, 9, 9, 9, 6, 6, 4, 8, 1, 3, 5, 5, 8, 8, 8, 4, 4, 0, 7, 8, 6, 1, 3, 0, 3

Offset

0,1

Links

Table of n, a(n) for n=0..104.

Eric Weisstein's World of Mathematics, Circular Sector Line Picking.

Formula

Equals (64*(-23 + 12*Pi))/(135*Pi^2).

Example

0.70605340938985211981936956070713315272380666325773...

Mathematica

RealDigits[64*(12*Pi-23)/(135*Pi^2), 10, 100][[1]] (* Amiram Eldar, Apr 14 2022 *)

Crossrefs

Cf. A093070, A130204.

Sequence in context: A264758 A362149 A195484 * A328717 A011479 A153871

Adjacent sequences: A130200 A130201 A130202 * A130204 A130205 A130206

Keyword

nonn,cons

Author

Eric W. Weisstein, May 16 2007

Status

approved