OFFSET
0,1
COMMENTS
3-almost prime analog of A065415.
FORMULA
The logarithm is -sum_{s>=2} sum_{j=1..floor[s/(1+r)]} binomial(s-r*j-1,j-1)*P_3(s)/j at r=3, where P_k(s) are the k-almost prime zeta functions of arXiv:0803.0900.
EXAMPLE
0.999645238332613367730... = (1-1/3584)*(1-1/19008)*(1-1/99144)*..
CROSSREFS
KEYWORD
AUTHOR
R. J. Mathar, Feb 13 2009
STATUS
approved