%I #14 Oct 01 2022 00:15:35
%S 5,3,1,7,3,6,1,5,5,2,7,1,6,5,4,8,0,8,1,8,9,4,5,0,2,4,5,0,0,2,3,4,3,5,
%T 5,4,8,3,9,2,6,4,8,3,6,8,3,6,7,1,6,1,3,8,4,6,4,1,4,2,3,3,6,9,5,5,8,7,
%U 3,3,8,5,3,7,7,3,0,9,6,5,4,4,1,2,4,8,5,1,9,7,0,2,1,5,6,3,3,9,9,6,2,4,8,6,8
%N Decimal expansion of 3*sqrt(Pi), the average perimeter of a random Gaussian triangle in two dimensions.
%H G. C. Greubel, <a href="/A249538/b249538.txt">Table of n, a(n) for n = 1..5000</a>
%H Steven R. Finch, <a href="/A102519/a102519.pdf">Random Triangles</a>, Jan 21 2010. [Cached copy, with permission of the author]
%H Eric Weisstein's MathWorld, <a href="http://mathworld.wolfram.com/GaussianTrianglePicking.html">Gaussian Triangle Picking</a>
%H <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a>
%e 5.317361552716548081894502450023435548392648368367161...
%t RealDigits[3*Sqrt[Pi], 10, 105] // First
%o (PARI) 3*sqrt(Pi) \\ _G. C. Greubel_, Jan 09 2017
%Y Cf. A002161 (average side length in two dimensions), A102556, A102557.
%K nonn,cons,easy
%O 1,1
%A _Jean-François Alcover_, Oct 31 2014
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