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URL: https://oeis.org/A125707

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A125707
Numbers k such that A024528(k) is prime.
2
1, 2, 3, 4, 5, 7, 14, 15, 17, 23, 32, 36, 42, 309, 1384, 1588, 5631, 11226
OFFSET
1,2
MATHEMATICA
f=1; Do[p=Prime[n]; f=f+1/p; g=Numerator[f]; If[PrimeQ[g], Print[{n, p, g}]], {n, 1, 50}]
CROSSREFS
Sequence in context: A268199 A178767 A337188 * A039060 A278442 A092065
KEYWORD
nonn,hard,more
AUTHOR
Alexander Adamchuk, Feb 01 2007
EXTENSIONS
a(14)-a(16) from Ryan Propper, Feb 11 2008
a(17)-a(18) from Michael S. Branicky, Apr 27 2025
STATUS
approved