A388339 Decimal expansion of 4 * exp(-5*Pi/6) * sqrt(2).

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

Offset

0,1

Links

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

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

Index entries for transcendental numbers.

Formula

Empirical: Equals Sum_{k>=0} A022615(k) / exp(k*Pi).

Example

0.41266220486206227696431178359552361010966295332734934606934935570235457488....

Mathematica

First[RealDigits[4*Sqrt[2]*Exp[(-5*Pi)/6], 10, 100]]

Prog

(PARI) 4 * exp(-5/6 * Pi) * sqrt(2)

Crossrefs

Cf. A022615.

Sequence in context: A366619 A343404 A220182 * A076064 A293570 A016685

Adjacent sequences: A388336 A388337 A388338 * A388340 A388341 A388342

Keyword

nonn,cons

Author

Simon Plouffe, Sep 15 2025

Status

approved