A388381 Decimal expansion of 8 * exp(-5*Pi/8) * 2^(1/8).

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

Offset

1,2

Links

Paolo Xausa, Table of n, a(n) for n = 1..10000

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

Formula

Empirical: Equals Sum_{k>=0} A029842(k) / exp(k*Pi).

Example

1.2245697168669159647671692055536925261...

Mathematica

First[RealDigits[8*Exp[-5*Pi/8]*2^(1/8), 10, 100]] (* Paolo Xausa, Sep 17 2025 *)

Prog

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

Crossrefs

Cf. A029842.

Sequence in context: A238433 A238424 A121269 * A211860 A250114 A056219

Adjacent sequences: A388378 A388379 A388380 * A388382 A388383 A388384

Keyword

nonn,cons

Author

Simon Plouffe, Sep 15 2025

Status

approved