OFFSET
0,1
LINKS
J. Borwein et al., Experimentation in Mathematics, 2004, section 1.2.
E. W. Weisstein, Infinite Product, MathWorld.
FORMULA
c=(Pi/3)*(cosh(sqrt(3)*Pi)+1)/(sinh(Pi)*(cosh(Pi)-cos(sqrt(3)*Pi))).
EXAMPLE
0.96590608576215921215...
MATHEMATICA
RealDigits[ -((Pi*(1 + Cosh[Sqrt[3]*Pi])*Csch[Pi])/(3*(Cos[Sqrt[3]*Pi] - Cosh[Pi]))), 10, 105] // First (* Jean-François Alcover, Feb 11 2013 *)
PROG
(PARI) Pi*(cosh(sqrt(3)*Pi)+1)/sinh(Pi)/(cosh(Pi)-cos(sqrt(3)*Pi))/3 \\ - M. F. Hasler, Feb 23 2013
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
R. J. Mathar, Feb 01 2009
STATUS
approved