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A125708
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Numbers n such that A115963(n) is prime.
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0
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OFFSET
| 1,1
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COMMENTS
| A115963(n) is the numerator of Sum[ 1/Prime[k]^3, {k,1,n} ].
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MATHEMATICA
| f=0; Do[p=Prime[n]; f=f+1/p^3; g=Numerator[f]; If[PrimeQ[g], Print[{n, p, g}]], {n, 1, 50}]
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CROSSREFS
| Cf. A115963, A024451, A092062, A061015, A109628.
Sequence in context: A013622 A027715 A082703 * A055289 A124974 A163550
Adjacent sequences: A125705 A125706 A125707 * A125709 A125710 A125711
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KEYWORD
| hard,more,nonn
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AUTHOR
| Alexander Adamchuk (alex(AT)kolmogorov.com), Feb 01 2007, Mar 01 2007
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EXTENSIONS
| a(6) from Alexander Adamchuk (alex(AT)kolmogorov.com), Sep 16 2010
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