A388336 Decimal expansion of 4 * exp(-17*Pi/24) * 2^(1/8).

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

Offset

0,1

Links

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

Simon Plouffe, Numbers in the base e^Pi, 2025.

Formula

Empirical: Equals Sum_{k>=0} A022612(k) / exp(k*Pi).

Example

0.47125447812955237835000141458674966288...

Mathematica

First[RealDigits[4*2^(1/8)*Exp[(-17*Pi)/24], 10, 100]]

Prog

(PARI) 4 * exp(-17/24 * Pi) * 2^(1/8)

Crossrefs

Cf. A022612.

Sequence in context: A197723 A186191 A388949 * A256507 A123734 A011519

Adjacent sequences: A388333 A388334 A388335 * A388337 A388338 A388339

Keyword

nonn,cons

Author

Simon Plouffe, Sep 15 2025

Status

approved