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%I #22 Sep 19 2017 04:04:19
%S 6,5,7,8,9,3,3,8,3,9,6,2,5,2,5,9,3,1,8,0,8,6,9,4,3,7,7,1,0,6,0,6,6,7,
%T 8,9,1,9,6,1,3,2,7,4,8,4,9,8,1,1,6,6,1,6,3,8,0,8,4,3,5,8,9,9,9,7,5,9,
%U 1,1,9,4,9,5,4,3,8,9,2,7,9,2,2,0,9,1,4,4,4,9,8,6,0,6,0,5,0,7,5
%N Decimal expansion of (1/3)*arccos(6/Pi^2-1).
%H M. Fraser, <a href="http://www.jstor.org/stable/2690163">A tale of two goats</a>, Math. Mag., 55 (1982), 221-227.
%e .65789338396252593180869437710606678919613274849811661638...
%t RealDigits[(ArcCos[6/Pi^2-1])/3,10,120][[1]] (* _Harvey P. Dale_, Nov 29 2015 *)
%o (PARI) acos(6/Pi^2-1)/3 \\ _Michel Marcus_, Sep 19 2017
%Y Cf. A192930, A229099.
%K nonn,cons
%O 0,1
%A _N. J. A. Sloane_, Jul 12 2011
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