A317704 Decimal expansion of arctan(2/Pi)*180/Pi.

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, 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, 6, 3, 7, 3, 3, 4, 0, 1, 0, 1, 9, 0, 7, 9, 3, 8, 2, 1, 6

Offset: 2

Author

Seiichi Manyama, Aug 04 2018

Keywords

• nonn
• cons

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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Examples

			32.481636590529753597442716152734642...
		

Crossrefs

Cf. A232247 (arctan(2/Pi)).

Programs

Mathematica

RealDigits[ArcTan[2/Pi]*180/Pi, 10, 100][[1]] (* Amiram Eldar, Jun 26 2021 *)

PARI

atan(2/Pi)*180/Pi

Extensions

More terms from Jon E. Schoenfield, Aug 05 2018