A388184 Decimal expansion of 648 * exp(-Pi).

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

Offset

2,1

Links

Table of n, a(n) for n=2..88.

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

Index entries for transcendental numbers.

Formula

Empirical: Equals Sum_{k>=0} A007267(k) / exp(k*Pi).

Example

28.0026190349244178538226936872797513066718151572902377715063574358808962105....

Mathematica

First[RealDigits[648*Exp[-Pi], 10, 100]]

Prog

(PARI) 648 * exp(-Pi)

Crossrefs

Cf. A007267.

Sequence in context: A095217 A230915 A242922 * A242530 A073410 A021361

Adjacent sequences: A388181 A388182 A388183 * A388185 A388186 A388187

Keyword

nonn,cons,changed

Author

Simon Plouffe, Sep 15 2025

Status

approved