A389052 - OEIS

A389052

Decimal expansion of (8 * sqrt(20+14 * sqrt(2)) * Gamma(5/4)^4) / Pi^3.

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

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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} A320149(k) / exp(k*Pi).

EXAMPLE

1.0986534618873295727942351752354792584...

MATHEMATICA

First[RealDigits[(8*Sqrt[20 + 14*Sqrt[2]]*Gamma[5/4]^4)/Pi^3, 10, 100]]