A388803 Decimal expansion of 8 * exp(-2*Pi/3) * sqrt(2).

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

Offset

1,2

Links

Table of n, a(n) for n=1..87.

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

Index entries for transcendental numbers.

Formula

Empirical: Equals Sum_{k>=0} A227175(k) / exp(k*Pi).

Example

1.3932233642391879418223721047920816697...

Mathematica

First[RealDigits[8*Sqrt[2]*Exp[(-2*Pi)/3], 10, 100]]

Prog

(PARI) 8 * exp(-2/3 * Pi) * sqrt(2)

Crossrefs

Cf. A227175.

Sequence in context: A016674 A264918 A091670 * A375503 A201416 A072560

Adjacent sequences: A388800 A388801 A388802 * A388804 A388805 A388806

Keyword

nonn,cons

Author

Simon Plouffe, Sep 18 2025

Status

approved