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A154943
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Decimal expansion of the negated value of the sum_q [log(1-1/q)+1/q] over the semiprimes q.
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0
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0, 7, 9, 8, 4, 8, 0, 4, 0, 3, 0, 6, 2, 3, 2, 6, 9, 1, 8, 9, 7, 4, 0, 2, 2, 5, 4, 7, 0, 5, 1, 3, 6, 6, 8, 2, 2, 7, 2, 3, 1, 1, 9, 0, 2, 0, 8, 4, 9, 0, 8, 6, 0, 3
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OFFSET
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0,2
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COMMENTS
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The semiprime analog of A143524. Taylor expansion of the logarithm shows that the value is sum_{s=2,3,..,infinity} P_2(s)/s, where P_2(s) are the semiprime zeta functions in Table 3 of the preprint arXiv:0803.0900. P_2(2)=A117543 and P_2(3)=0.023806..., P_2(4)=0.004994... etc.
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LINKS
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FORMULA
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Equals the negative of Sum_{i>=1} ( log(1-1/A001358(i)) +1/A001358(i)).
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EXAMPLE
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Equals 0.079848040306232691897402254...
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CROSSREFS
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KEYWORD
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AUTHOR
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STATUS
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approved
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