A388660 Decimal expansion of exp(-Pi/6) * 2^(5/8).

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

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} A143161(k) / exp(k*Pi).

Example

0.91358232414156226737702630556293089484...

Mathematica

First[RealDigits[2^(5/8)*Exp[-1/6*Pi], 10, 100]]

Prog

(PARI) exp(-1/6 * Pi) * 2^(5/8)

Crossrefs

Cf. A143161.

Sequence in context: A388480 A248557 A388580 * A388631 A388618 A388907

Adjacent sequences: A388657 A388658 A388659 * A388661 A388662 A388663

Keyword

nonn,cons

Author

Simon Plouffe, Sep 18 2025

Status

approved