A388579 Decimal expansion of 16 * exp(-Pi).

6, 9, 1, 4, 2, 2, 6, 9, 2, 2, 2, 0, 3, 5, 5, 9, 9, 6, 3, 9, 0, 6, 8, 3, 7, 9, 4, 7, 4, 7, 6, 4, 8, 1, 8, 0, 4, 1, 1, 6, 4, 9, 7, 5, 6, 9, 7, 0, 1, 2, 9, 3, 2, 7, 6, 9, 1, 5, 1, 4, 9, 9, 8, 4, 1, 6, 8, 1, 2, 2, 5, 2, 1, 1, 2, 2, 8, 7, 4, 8, 3, 1, 7, 0, 2, 3, 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} A124972(k) / exp(k*Pi).

Example

0.69142269222035599639068379474764818041...

Mathematica

First[RealDigits[16*Exp[-Pi], 10, 100]]

Prog

(PARI) 16 * exp(-Pi)

Crossrefs

Cf. A124972.

Sequence in context: A154116 A388396 A388091 * A275614 A198504 A357066

Adjacent sequences: A388576 A388577 A388578 * A388580 A388581 A388582

Keyword

nonn,cons

Author

Simon Plouffe, Sep 18 2025

Status

approved