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A102520 Decimal expansion of 1-(9*sqrt(3))/(8*Pi). 8
3, 7, 9, 7, 5, 4, 9, 9, 2, 6, 5, 0, 4, 8, 3, 9, 4, 4, 2, 9, 9, 7, 5, 7, 6, 8, 9, 3, 9, 7, 9, 0, 9, 3, 7, 8, 4, 2, 7, 9, 4, 0, 2, 0, 9, 5, 8, 7, 5, 2, 9, 2, 6, 5, 6, 0, 0, 7, 1, 3, 2, 2, 7, 1, 7, 2, 5, 9, 0, 9, 0, 8, 5, 9, 7, 0, 7, 1, 4, 8, 0, 8, 0, 4, 5, 7, 2, 4, 6, 7, 5, 7, 3, 9, 3, 2, 7, 4, 9, 6, 4, 1, 3, 3, 9 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

This is the probability that a Gaussian triangle in 5 dimensions is obtuse.

Also, the probability that the distance between 2 randomly selected points within a 4-dimensional ball will be smaller than its radius. - Amiram Eldar, Apr 14 2022

LINKS

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

Steven R. Finch, Random Triangles, January 21, 2010. [Cached copy, with permission of the author]

Eric Weisstein's World of Mathematics, Ball Line Picking.

Eric Weisstein's World of Mathematics, Gaussian Triangle Picking.

Index entries for transcendental numbers

MATHEMATICA

RealDigits[1 - (9*Sqrt[3])/(8*Pi), 10, 50][[1]] (* G. C. Greubel, Jun 02 2017 *)

PROG

(PARI) 1 - (9*sqrt(3))/(8*Pi) \\ G. C. Greubel, Jun 01 2017

CROSSREFS

Cf. A102519.

Sequence in context: A011271 A005534 A113014 * A275667 A122490 A347926

Adjacent sequences: A102517 A102518 A102519 * A102521 A102522 A102523

KEYWORD

cons,nonn

AUTHOR

Mark Hudson (mrmarkhudson(AT)hotmail.com), Jan 13 2005

STATUS

approved

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Last modified December 3 23:46 EST 2022. Contains 358544 sequences. (Running on oeis4.)