A301864 Decimal expansion of the probability of intersection of 2 random chords in a sphere when they are projected onto a plane that passes the center, where each chord is selected by 2 random points within the sphere.

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

Offset: 1

Author

Amiram Eldar, Mar 28 2018

Keywords

• nonn
• cons

Examples

			0.72775418543436709139292411039475642544602329673801...
		

Links

• Herbert Solomon, Geometric Probability, SIAM, 1978, p. 153.

Crossrefs

Cf. A301862, A301863, A301865.

Programs

Mathematica

RealDigits[1/3 + 7007/(1800*Pi^2), 10, 100][[1]]

PARI

1/3 + 7007/(1800*Pi^2) \\ Altug Alkan, Mar 28 2018

Formula

1/3 + 7007/(1800*Pi^2)