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A146490
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Decimal expansion of Product_{q in A001358} (1-1/(q^3*(q-1))).
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0
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9, 9, 3, 5, 2, 1, 5, 8, 9, 7, 1, 0, 5, 0, 5, 4, 6, 0, 6, 7, 5, 4, 0, 9, 2, 6, 9, 2, 4, 1, 4, 1, 6, 4, 2, 9, 4, 0, 1, 1, 1, 5, 0, 7, 8, 6, 7, 7, 8, 1, 5, 6, 6, 0, 1, 8, 8
(list; constant; graph; refs; listen; history; internal format)
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OFFSET
| 0,1
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COMMENTS
| Semiprime analog of A065415.
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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=3, where P_k(s) are the k-almost prime zeta functions of arXiv:0803.0900.
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EXAMPLE
| 0.993521589710505460675409269.. = (1-1/192)*(1-1/1080)*(1-1/5832)*...
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CROSSREFS
| Sequence in context: A110639 A011211 A074879 * A140416 A179102 A153505
Adjacent sequences: A146487 A146488 A146489 * A146491 A146492 A146493
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KEYWORD
| nonn,cons,less
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AUTHOR
| R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Feb 13 2009
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