A317704 - OEIS

%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