

A249521


Decimal expansion of 4/sqrt(Pi), the average distance between two random Gaussian points in three dimensions.


3



2, 2, 5, 6, 7, 5, 8, 3, 3, 4, 1, 9, 1, 0, 2, 5, 1, 4, 7, 7, 9, 2, 3, 1, 7, 8, 0, 6, 2, 4, 3, 0, 9, 0, 3, 4, 3, 3, 7, 6, 2, 0, 2, 5, 1, 7, 3, 1, 5, 9, 9, 5, 4, 2, 7, 3, 7, 6, 3, 4, 2, 8, 8, 6, 8, 4, 2, 5, 6, 9, 8, 7, 3, 7, 6, 5, 9, 7, 3, 6, 5, 7, 9, 4, 6, 9, 7, 4, 6, 4, 0, 8, 0, 8, 4, 2, 9, 4, 5, 3, 7, 7, 2
(list;
constant;
graph;
refs;
listen;
history;
text;
internal format)



OFFSET

1,1


COMMENTS

Coordinates are independent normally distributed random variables with mean 0 and variance 1.


LINKS

G. C. Greubel, Table of n, a(n) for n = 1..5000
Steven R. Finch, Random Triangles, January 21, 2010. [Cached copy, with permission of the author]


EXAMPLE

2.25675833419102514779231780624309034337620251731...


MATHEMATICA

RealDigits[4/Sqrt[Pi], 10, 103] // First


PROG

(PARI) 4/sqrt(Pi) \\ G. C. Greubel, Jan 09 2017


CROSSREFS

Cf. A002161 (the analog constant in two dimensions), A087197, A190732 (the analog constant in one dimension).
Sequence in context: A209527 A054255 A063177 * A034803 A205885 A239262
Adjacent sequences: A249518 A249519 A249520 * A249522 A249523 A249524


KEYWORD

nonn,cons,easy


AUTHOR

JeanFrançois Alcover, Oct 31 2014


STATUS

approved



