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%I #21 Mar 20 2023 13:40:51
%S 1,0,0,3,8,8,4,8,2,1,8,5,3,8,8,7,2,1,4,1,4,8,4,2,3,9,4,4,9,1,7,1,3,2,
%T 2,8,8,2,9,2,1,0,4,4,6,0,5,9,4,8,7,0,5,7,4,7,2,9,7,1,2,8,2,4,1,0,8,0,
%U 1,5,1,9,1,3,8,3,3,9,5,3,1,6,5,6,0,9,1,5,5,5,6,0,1,8,0,9,8,6,2,9,2,7,7,8,0
%N Decimal expansion of the arctan of Pi/2.
%F Equals A019669 - A232247. [_Bruno Berselli_, Nov 20 2013]
%e Equals 1.00388482185388721414842394491713228829210446059487057472971...
%p evalf(arctan(Pi/2)) ;
%t RealDigits[ArcTan[Pi/2],10,120][[1]] (* _Harvey P. Dale_, Jan 31 2015 *)
%Y Cf. A019669, A232247.
%K cons,nonn
%O 1,4
%A _R. J. Mathar_, Nov 20 2013