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A146493
Decimal expansion of Product_{q in A001358} (1-1/(q^4*(q-1))).
0
9, 9, 8, 5, 0, 9, 5, 0, 0, 6, 0, 7, 5, 7, 3, 7, 5, 4, 5, 8, 7, 1, 5, 0, 2, 1, 3, 5, 7, 8, 1, 3, 1, 2, 7, 7, 8, 4, 8, 2, 0, 9, 9, 3, 2, 9, 9, 6, 8, 6, 2, 1, 5, 9, 0, 3, 6
OFFSET
0,1
COMMENTS
Semiprime analog of A065416.
FORMULA
The logarithm is -sum_{s>=2} sum_{j=1..floor[s/(1+r)]} binomial(s-r*j-1,j-1)*P_2(s)/j at r=4, where P_k(s) are the k-almost prime zeta functions of arXiv:0803.0900.
EXAMPLE
0.998509500607573754... = (1-1/768)*(1-1/6480)*(1-1/52488)*..
CROSSREFS
Sequence in context: A347057 A334446 A051554 * A347055 A371465 A346727
KEYWORD
nonn,cons,less
AUTHOR
R. J. Mathar, Feb 13 2009
STATUS
approved