OFFSET
0,2
COMMENTS
No closed form is known.
FORMULA
(1 - (192*Sum_{n=1..infinity} (tanh(((-1 + 2*n)*Pi)/2)/(-1 + 2*n)^5))/Pi^5)/3.
EXAMPLE
0.14057701495515371558...
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Eric W. Weisstein, Aug 26 2010
STATUS
approved