A388403 Decimal expansion of 72 * exp(-Pi).

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

Offset

1,1

Links

Paolo Xausa, Table of n, a(n) for n = 1..10000

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

Formula

Empirical: Equals Sum_{k>=0} A035099(k) / exp(k*Pi).

Example

3.1114021149916019837580770763644168119...

Mathematica

First[RealDigits[72*Exp[-Pi], 10, 100]] (* Paolo Xausa, Sep 17 2025 *)

Prog

(PARI) 72 * exp(-Pi)

Crossrefs

Cf. A035099.

Sequence in context: A195644 A143632 A336455 * A130605 A354872 A368335

Adjacent sequences: A388400 A388401 A388402 * A388404 A388405 A388406

Keyword

nonn,cons

Author

Simon Plouffe, Sep 15 2025

Status

approved