OFFSET
1,1
LINKS
Jonathan M. Borwein, Armin Straub, Special Values of Generalized Log-sine Integrals.
FORMULA
-Integral_{0..Pi/3} log(2*sin(x/2))^2 dx = -7*Pi^3/108.
EXAMPLE
-2.0096660811305439002623537543491645038479353700110717949908496919...
MATHEMATICA
RealDigits[-7*Pi^3/108, 10, 105] // First
CROSSREFS
KEYWORD
AUTHOR
Jean-François Alcover, Jun 09 2015
STATUS
approved