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Search: id:A136366
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| 3, 4, 5, 10, 21, 31, 55, 77, 121, 135, 148
(list; graph; listen)
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OFFSET
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1,1
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MATHEMATICA
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f=0; Do[ p=Prime[n]; f=f + (-1)^(n+1)*1/p; g=Numerator[f] ; If[ PrimeQ[g], Print[ {n, g} ] ], {n, 1, 150} ]
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CROSSREFS
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Cf. A024530 = Numerator of Sum_{k=1..n} (-1)^k / prime(k). Cf. A136365, A136367, A136368, A136369, A136370, A136371.
Sequence in context: A058615 A082612 A122413 this_sequence A123820 A133320 A128920
Adjacent sequences: A136363 A136364 A136365 this_sequence A136367 A136368 A136369
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KEYWORD
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more,nonn
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AUTHOR
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Alexander Adamchuk (alex(AT)kolmogorov.com), Dec 27 2007
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