OFFSET
1,1
COMMENTS
Constant from generalized Pi integrals: the case of n=18.
LINKS
Takayuki Tatekawa, Table of n, a(n) for n = 1..10001
FORMULA
Equals 2*Integral_{x=0..1} dx/sqrt(1-x^18).
Equals Gamma(1/18)^2 / (9 * 2^(8/9) * Gamma(1/9)). - Vaclav Kotesovec, Apr 29 2024
EXAMPLE
2.14999545849204723391222945664...
MATHEMATICA
RealDigits[Sqrt[Pi]/9*Gamma[1/18]/Gamma[5/9], 10, 5001][[1]]
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Takayuki Tatekawa, Apr 28 2024
STATUS
approved