A388680 Decimal expansion of (1/18) * exp(2*Pi/3) * 3^(1/2).

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

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} A164271(k) / exp(k*Pi).

Example

0.78139811307150437932251450817100214469601350525378834518782242310404025665....

Mathematica

First[RealDigits[Exp[(2*Pi)/3]/(6*Sqrt[3]), 10, 100]]

Prog

(PARI) (1/18) * exp(2/3 * Pi) * 3^(1/2)

Crossrefs

Cf. A164271.

Sequence in context: A021132 A019936 A086724 * A268979 A329219 A093720

Adjacent sequences: A388677 A388678 A388679 * A388681 A388682 A388683

Keyword

nonn,cons,changed

Author

Simon Plouffe, Sep 18 2025

Status

approved