A388378 Decimal expansion of 2 * exp(-Pi / 4) * 2^(1/4).

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

Offset

1,3

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} A029839(k) / exp(k*Pi).

Example

1.0844097310806848357799229895721541605...

Mathematica

First[RealDigits[2*2^(1/4)*Exp[-1/4*Pi], 10, 100]]

Prog

(PARI) 2 * exp(-Pi / 4) * 2^(1/4)

Crossrefs

Cf. A029839.

Sequence in context: A388675 A019723 A384036 * A093822 A356810 A011360

Adjacent sequences: A388375 A388376 A388377 * A388379 A388380 A388381

Keyword

nonn,cons

Author

Simon Plouffe, Sep 15 2025

Status

approved