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%I #32 Jun 27 2021 12:38:38
%S 3,2,4,8,1,6,3,6,5,9,0,5,2,9,7,5,3,5,9,7,4,4,2,7,1,6,1,5,2,7,3,4,6,4,
%T 2,1,1,5,6,0,0,6,8,2,0,9,8,7,9,7,8,0,3,1,5,9,6,4,2,5,7,1,0,9,3,2,4,2,
%U 6,3,7,3,3,4,0,1,0,1,9,0,7,9,3,8,2,1,6
%N Decimal expansion of arctan(2/Pi)*180/Pi.
%C The degree of the slope when spreading books. The binding and cover are such that each of the pages follows a quarter-circle arc that begins at the binding and intersects it perpendicularly, and that the length of the arc for the last (or first) page of the book is zero.
%C _______
%C =======\
%C ========\
%e 32.481636590529753597442716152734642...
%t RealDigits[ArcTan[2/Pi]*180/Pi, 10, 100][[1]] (* _Amiram Eldar_, Jun 26 2021 *)
%o (PARI) atan(2/Pi)*180/Pi
%Y Cf. A232247 (arctan(2/Pi)).
%K nonn,cons
%O 2,1
%A _Seiichi Manyama_, Aug 04 2018
%E More terms from _Jon E. Schoenfield_, Aug 05 2018