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

2,1

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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Links

Table of n, a(n) for n=2..88.

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

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

Sequence in context: A215335 A229976 A084695 * A201422 A231330 A254051

Adjacent sequences: A317701 A317702 A317703 * A317705 A317706 A317707

Keyword

nonn,cons

Author

Seiichi Manyama, Aug 04 2018

Extensions

More terms from Jon E. Schoenfield, Aug 05 2018

Status

approved