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Search: id:A136682
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| 2, 3, 5, 8, 23, 41, 47, 48, 49, 95, 125, 203, 209, 284, 323, 395, 504
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OFFSET
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1,1
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COMMENT
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A119682 = Numerator of Sum (-1)^(k+1)*1/k^2, k = 1..n.
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LINKS
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Eric Weisstein, The World of Mathematics: Harmonic Number
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MATHEMATICA
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Do[ f=Numerator[ Sum[ (-1)^(k+1)*1/k^2, {k, 1, n} ] ]; If[ PrimeQ[f], Print[ {n, f} ] ], {n, 1, 125} ]
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CROSSREFS
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Cf. A058313, A119682, A120296, A136675, A136676, A136677. Cf. A001008, A007406, A007408, A007410, A099828, A103345. Cf. A136681, A136683, A136684, A136685, A136686.
Adjacent sequences: A136679 A136680 A136681 this_sequence A136683 A136684 A136685
Sequence in context: A053056 A041157 A042785 this_sequence A107467 A041731 A041331
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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), Jan 16 2008
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EXTENSIONS
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a(12)-a(17) from Alexander Adamchuk (alex(AT)kolmogorov.com), Apr 28 2008
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