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%I #20 Mar 12 2015 00:25:45
%S 1,5,7,0,7,9,6,3,2,6,7,9,4,8,9,6,6,1,9,2,3,1,3,2,1,6,9,1,6,3,9,7,5,1,
%T 4,4,2,0,9,8,5,8,4,6,9,9,6,8,7,5,4,2,9,1,0,4,8,7,4,7,2,2,9,6,1,5,3,9,
%U 0,8,2,0,3,1,4,3,1,0,4,4,9,9,3,1,4,0,1,7,4,1,2,6,7,1,0,5,8,5,3,3,9,9,1,0,7
%N Decimal expansion of arctan(10^50).
%C Not the same as A019669. First differing term occurs at 10^-49, as list -49, or 51st counting term (a(-49)= 4 and A019669(-49) = 5). - _John W. Nicholson_, Oct 07 2013
%H J. Blanck, <a href="http://cs-svr1.swan.ac.uk/~csjens/pdf/20640389.pdf">Exact real arithmetic systems: results of competition</a>, pp. 389-393 of J. Blanck et al., eds., Computability and Complexity in Analysis (CCA 2000), Lect. Notes Computer Science, Springer-Verlag, 2001.
%t RealDigits[ ArcTan[10^50], 10, 111][[1]] (* _Robert G. Wilson v_, Jan 25 2005 *)
%o (PARI) atan(1e50) \\ _Charles R Greathouse IV_, Mar 25 2014
%K cons,nonn
%O 1,2
%A _N. J. A. Sloane_, Jul 15 2003
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