A388334 Decimal expansion of 2 * exp(-5*Pi/8) * 2^(7/8).

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

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} A022610(k) / exp(k*Pi).

Example

0.51486814257082290650181159304353022882...

Mathematica

First[RealDigits[2*2^(7/8)*Exp[(-5*Pi)/8], 10, 100]]

Prog

(PARI) 2 * exp(-5/8 * Pi) * 2^(7/8)

Crossrefs

Cf. A022610.

Sequence in context: A384510 A232809 A011301 * A316248 A394005 A180132

Adjacent sequences: A388331 A388332 A388333 * A388335 A388336 A388337

Keyword

nonn,cons

Author

Simon Plouffe, Sep 15 2025

Status

approved