A388307 Decimal expansion of (1/4) * exp(2*Pi/3).

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

Offset

1,1

Links

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

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

Formula

Empirical: Equals Sum_{k>=0} A022581(k) / exp(k*Pi).

Example

2.0301318491674440789617494048388798330...

Mathematica

First[RealDigits[Exp[(2*Pi)/3]/4, 10, 100]]

Prog

(PARI) (1/4) * exp(2/3 * Pi)

Crossrefs

Cf. A022581.

Sequence in context: A336316 A362110 A236138 * A380273 A363930 A361755

Adjacent sequences: A388304 A388305 A388306 * A388308 A388309 A388310

Keyword

nonn,cons

Author

Simon Plouffe, Sep 15 2025

Status

approved