A347058 Decimal expansion of (1 + tanh(Pi)) / 2.

9, 9, 8, 1, 3, 6, 0, 3, 8, 1, 1, 0, 3, 7, 4, 9, 7, 2, 1, 3, 2, 3, 4, 5, 2, 9, 0, 0, 0, 6, 2, 6, 8, 3, 5, 5, 9, 4, 8, 4, 4, 9, 5, 9, 5, 4, 0, 2, 2, 9, 3, 8, 0, 7, 1, 8, 1, 3, 0, 6, 2, 0, 7, 9, 8, 9, 2, 7, 0, 6, 4, 9, 4, 9, 1, 4, 1, 0, 8, 5, 8, 8, 4, 2, 6, 4, 1

Offset

0,1

Links

Table of n, a(n) for n=0..86.

L. B. W. Jolley, Summation of Series, Dover, 1961, Eq. (944).

Michael I. Shamos, Shamos's catalog of the real numbers (2011).

Formula

Equals exp(2*Pi) / (1 + exp(2*Pi)).

Equals Sum_{k>=0} (-1)^k * exp(-2*Pi*k).

Example

0.99813603811037497213234529000626835594844959540...

Mathematica

RealDigits[(1 + Tanh[Pi])/2, 10, 120][[1]] (* Amiram Eldar, Jun 07 2023 *)

Crossrefs

Cf. A216707, A344505.

Sequence in context: A202692 A259149 A292825 * A091667 A300284 A347057

Adjacent sequences: A347055 A347056 A347057 * A347059 A347060 A347061

Keyword

nonn,cons

Author

Sean A. Irvine, Aug 14 2021

Status

approved