A388442 Decimal expansion of 3 * exp(-Pi / 4) * 2^(3/4).

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

Offset

1,1

Links

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

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

Formula

Empirical: Equals Sum_{k>=0} A052241(k) / exp(k*Pi).

Example

2.3003804232954979688194262905160452210...

Mathematica

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

Prog

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

Crossrefs

Cf. A052241.

Sequence in context: A292596 A011023 A284610 * A383584 A234017 A182057

Adjacent sequences: A388439 A388440 A388441 * A388443 A388444 A388445

Keyword

nonn,cons

Author

Simon Plouffe, Sep 15 2025

Status

approved