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%I #13 Jan 26 2023 05:22:40
%S 1,8,1,1,5,2,6,2,7,2,4,6,0,8,5,3,1,0,7,0,2,1,8,5,2,0,4,9,3,0,5,4,2,0,
%T 5,1,0,2,2,0,7,0,2,0,8,1,0,5,7,9,2,2,4,7,4,8,6,1,5,9,5,6,2,2,9,7,4,7,
%U 2,1,4,4,9,5,3,1,6,2,0,1,4,7,6,8,4,4,5,2,3,1,0,0,3,2,6,1,7,0,2,7,5,1,4
%N Decimal expansion of arccosh(Pi).
%H Michael I. Shamos, <a href="http://euro.ecom.cmu.edu/people/faculty/mshamos/cat.pdf">A catalog of the real numbers</a> (2011).
%F Equals |arccos(Pi)|.
%F Equals log(Pi + sqrt(Pi^2 - 1)) = log(A189089). - _Amiram Eldar_, Jan 05 2023
%e 1.811526272460853107021852049305420510220702081057922474861595622974...
%t N[Abs[ArcCos[Pi]], 105]
%o (PARI) -I*acos(Pi) \\ _Hugo Pfoertner_, Jan 24 2023
%Y Cf. A189089.
%K cons,nonn
%O 1,2
%A _Wolfe Padawer_, Jan 05 2023
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