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A152441
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Decimal expansion of Sum_{primes p} 1/(p^2*(p-1)).
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3
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3, 2, 0, 9, 0, 9, 2, 4, 9, 0, 0, 8, 7, 2, 9, 6, 2, 9, 3, 5, 7, 8, 2, 4, 0, 9, 5, 0, 2, 3, 6, 9, 4, 4, 6, 1, 4, 4, 5, 5, 0, 9, 9, 9, 2, 8, 4, 3, 2, 9, 3, 6, 2, 6, 5, 7, 4, 5, 8, 7, 1, 3, 7, 0, 0, 5, 5, 4, 4, 0, 0, 1, 1, 2, 5, 3, 2, 2, 5, 2, 3, 3, 8, 4, 8, 4, 1, 2, 1, 4, 4, 6, 8, 4, 1, 3, 9, 6, 0, 1, 0, 6, 1, 3
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OFFSET
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0,1
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COMMENTS
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Generally, sum_p 1/(p^s*(p-1)) equals A136141 minus the sum over all prime zeta functions with index 2 to s (see A085964 to A085969).
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LINKS
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FORMULA
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EXAMPLE
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0.320909249008729629357824095023694461445509992843293626574587137005544001125... = 1/(4*1) + 1/(9*2) + 1/(25*4) + 1/(49*6) + ...
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MATHEMATICA
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digits = 104; sp = NSum[PrimeZetaP[n], {n, 3, Infinity}, WorkingPrecision -> digits + 10, NSumTerms -> 2*digits]; RealDigits[sp, 10, digits] // First (* Jean-François Alcover, Sep 11 2015 *)
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PROG
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(PARI) sumeulerrat(1/(p^2*(p-1))) \\ Amiram Eldar, Mar 18 2021
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CROSSREFS
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KEYWORD
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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