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Search: id:A092065
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| A092065 |
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Numbers n such that numerator of Sum_{i=1..n} 1/(prime(i)-i) is prime. |
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+0
3
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| 2, 3, 4, 5, 7, 14, 21, 22, 26, 27, 32, 43, 51, 58, 62, 65, 82, 131, 148, 207, 229, 249, 257, 320, 334, 386, 423, 440, 481
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Note that the definition here is subtly different from that of A092063.
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MATHEMATICA
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f=0; Do[ p=Prime[n]; f=f+1/(p-n); g=Numerator[f]; If[ PrimeQ[g], Print[n]], {n, 1, 500} ]
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CROSSREFS
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Cf. A092066.
Sequence in context: A066661 A125707 A039060 this_sequence A044955 A044817 A048303
Adjacent sequences: A092062 A092063 A092064 this_sequence A092066 A092067 A092068
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KEYWORD
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nonn
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AUTHOR
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Mohammed Bouayoun (mohammed.bouayoun(AT)sanef.com), Feb 20 2004; corrected Apr 24 2006
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EXTENSIONS
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Sequence and Mma program corrected by Alexander Adamchuk, Jul 29 2007
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