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A130425
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a(n) = numerator of Sum_{k=1..n} 1/k^(n+1-k).
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1
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1, 3, 19, 107, 1471, 164059, 65442581, 26560388929, 10901416818161, 4504891039128649, 20562691778919031051, 94108143760454361244249, 5609165278757040127506253363, 334755533004517896353486403105731
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OFFSET
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1,2
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LINKS
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Table of n, a(n) for n=1..14.
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MATHEMATICA
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Table[Numerator[Sum[1/k^(n + 1 - k), {k, 1, n}]], {n, 1, 20}] (* Stefan Steinerberger, May 30 2007 *)
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CROSSREFS
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Cf. A130426, A003101.
Sequence in context: A323290 A072950 A240123 * A334976 A103005 A162354
Adjacent sequences: A130422 A130423 A130424 * A130426 A130427 A130428
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KEYWORD
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frac,nonn
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AUTHOR
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Leroy Quet, May 26 2007
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EXTENSIONS
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More terms from Stefan Steinerberger, May 30 2007
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STATUS
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approved
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