A388181 Decimal expansion of 6 * exp(-Pi / 2) * sqrt(2).

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

Offset

1,2

Links

Table of n, a(n) for n=1..87.

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

Index entries for transcendental numbers.

Formula

Empirical: Equals Sum_{k>=0} A007248(k) / exp(k*Pi).

Example

1.76391669729372480470142145705521620655381671095231794944395779612686526161....

Mathematica

First[RealDigits[6*Sqrt[2]*Exp[-1/2*Pi], 10, 100]]

Prog

(PARI) 6 * exp(-Pi / 2) * sqrt(2)

Crossrefs

Cf. A007248.

Sequence in context: A013675 A198878 A332982 * A335996 A187799 A288935

Adjacent sequences: A388178 A388179 A388180 * A388182 A388183 A388184

Keyword

nonn,cons

Author

Simon Plouffe, Sep 15 2025

Status

approved