A388337 Decimal expansion of 4 * exp(-3*Pi/4) * 2^(1/4).

4, 5, 0, 8, 5, 3, 2, 7, 0, 9, 7, 5, 3, 9, 2, 8, 2, 4, 7, 4, 4, 6, 2, 3, 8, 6, 3, 8, 9, 6, 1, 2, 5, 8, 0, 1, 9, 6, 6, 6, 9, 6, 0, 7, 1, 4, 7, 0, 4, 3, 1, 3, 1, 1, 1, 1, 2, 3, 1, 3, 3, 8, 1, 0, 9, 6, 5, 1, 4, 0, 8, 8, 3, 6, 4, 2, 5, 7, 5, 1, 8, 7, 7, 8, 7, 2, 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} A022613(k) / exp(k*Pi).

Example

0.45085327097539282474462386389612580197...

Mathematica

First[RealDigits[4*2^(1/4)*Exp[(-3*Pi)/4], 10, 100]]

Prog

(PARI) 4 * exp(-3/4 * Pi) * 2^(1/4)

Crossrefs

Cf. A022613.

Sequence in context: A320162 A388881 A388900 * A354068 A387236 A200013

Adjacent sequences: A388334 A388335 A388336 * A388338 A388339 A388340

Keyword

nonn,cons

Author

Simon Plouffe, Sep 15 2025

Status

approved