OFFSET
0,1
REFERENCES
Alexander Apelblat, Tables of Integrals and Series, Harri Deutsch, (1996), 4.1.38
FORMULA
(1+log(2+sqrt(3))/sqrt(3))/3 .
EXAMPLE
0.58678199876...
MAPLE
1/3+1/9*ln(2+3^(1/2))*3^(1/2) ;
MATHEMATICA
RealDigits[Sum[(-1)^(n-1) 2^n/Binomial[2n, n], {n, \[Infinity]}], 10, 120][[1]] (* Harvey P. Dale, Apr 22 2022 *)
CROSSREFS
KEYWORD
AUTHOR
R. J. Mathar, Feb 08 2009
STATUS
approved