A388338 Decimal expansion of 4 * exp(-19*Pi/24) * 2^(3/8).

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

Offset

0,1

Links

Table of n, a(n) for n=0..86.

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

Formula

Empirical: Equals Sum_{k>=0} A022614(k) / exp(k*Pi).

Example

0.43133525808815864778086987966028546307...

Mathematica

First[RealDigits[4*2^(3/8)*Exp[(-19*Pi)/24], 10, 100]]

Prog

(PARI) 4 * exp(-19/24 * Pi) * 2^(3/8)

Crossrefs

Cf. A022614.

Sequence in context: A123683 A143783 A010306 * A197700 A006467 A119505

Adjacent sequences: A388335 A388336 A388337 * A388339 A388340 A388341

Keyword

nonn,cons

Author

Simon Plouffe, Sep 15 2025

Status

approved