A388496 Decimal expansion of 4 * exp(-Pi/3).

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

Offset

1,2

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} A101127(k) / exp(k*Pi).

Example

1.4036792287136438702629468639878122335...

Mathematica

First[RealDigits[4*Exp[-1/3*Pi], 10, 100]]

Prog

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

Crossrefs

Cf. A101127.

Sequence in context: A085655 A338656 A153615 * A352718 A338736 A281531

Adjacent sequences: A388493 A388494 A388495 * A388497 A388498 A388499

Keyword

nonn,cons

Author

Simon Plouffe, Sep 17 2025

Status

approved