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Decimal expansion of 3/sqrt(Pi).
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%I #28 Oct 13 2024 01:58:42

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

%T 7,5,7,5,3,2,1,5,1,8,8,7,9,8,6,9,9,6,5,7,0,5,3,2,2,5,7,1,6,5,1,3,1,9,

%U 2,7,4,0,5,3,2,4,4,8,0,2,4,3,4,6,0,2,3,0

%N Decimal expansion of 3/sqrt(Pi).

%D R. K. Guy, Unsolved Problems in Number Theory, Springer, 1st edition, 1981. See section E10.

%H Steven R. Finch, <a href="http://arxiv.org/abs/1111.4976">Mean width of a regular simplex</a>, arxiv:1111.4976 [math.MG], (2016), mu_3.

%H <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a>.

%F Equals 3*A087197.

%e 1.6925687506432688608442383546823177...

%p 3/sqrt(Pi); evalf(%) ;

%t First[RealDigits[3/Sqrt[Pi], 10, 100]] (* _Paolo Xausa_, Apr 29 2024 *)

%o (Python)

%o from mpmath import mp, sqrt, pi

%o mp.dps=90

%o print([int(z) for z in list(str(3/sqrt(pi)).replace('.', '')[:-2])]) # _Indranil Ghosh_, Jul 08 2017

%o (PARI) 3/sqrt(Pi) \\ _Charles R Greathouse IV_, Oct 01 2022

%Y Cf. A087197 (1/sqrt(Pi)).

%K nonn,cons,easy

%O 1,2

%A _R. J. Mathar_, Jul 07 2017