A388802 Decimal expansion of 2 * exp(-Pi/3) * 2^(3/4).

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

Offset

1,3

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} A227033(k) / exp(k*Pi).

Example

1.1803488315914020261662019421437427014...

Mathematica

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

Prog

(PARI) 2 * exp(-1/3 * Pi) * 2^(3/4)

Crossrefs

Cf. A227033.

Sequence in context: A388639 A388940 A388611 * A195342 A307184 A350811

Adjacent sequences: A388799 A388800 A388801 * A388803 A388804 A388805

Keyword

nonn,cons

Author

Simon Plouffe, Sep 18 2025

Status

approved