OFFSET
0,2
COMMENTS
c/4 where c is the constant defined in A085011.
FORMULA
Product_{k>=0} (1 - 1/(2^k+1)) = 0.2097112208975537988549780538514871...
PROG
(PARI) contfrac(prod(k=0, 1000, 1-1./(2^k+1)))
CROSSREFS
KEYWORD
cofr,nonn
AUTHOR
Benoit Cloitre, Jun 19 2003
STATUS
approved