OFFSET
2,1
COMMENTS
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.
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EXAMPLE
32.481636590529753597442716152734642...
MATHEMATICA
RealDigits[ArcTan[2/Pi]*180/Pi, 10, 100][[1]] (* Amiram Eldar, Jun 26 2021 *)
PROG
(PARI) atan(2/Pi)*180/Pi
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Seiichi Manyama, Aug 04 2018
EXTENSIONS
More terms from Jon E. Schoenfield, Aug 05 2018
STATUS
approved