A388481 Decimal expansion of (1/4) * exp(Pi / 2).

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

Offset

1,2

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} A093160(k) / exp(k*Pi).

Example

1.2026193452413379138682589166759582816...

Mathematica

First[RealDigits[Exp[Pi/2]/4, 10, 100]]

Prog

(PARI) (1/4) * exp(Pi / 2)

Crossrefs

Cf. A093160.

Sequence in context: A139213 A344873 A306079 * A373167 A242860 A320239

Adjacent sequences: A388478 A388479 A388480 * A388482 A388483 A388484

Keyword

nonn,cons

Author

Simon Plouffe, Sep 17 2025

Status

approved