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Search: id:A120272
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| A120272 |
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Numerator of Sum[ k/Prime[k], {k,1,n}]. |
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+0
1
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| 1, 7, 53, 491, 6451, 97723, 1871501, 39642599, 999076987, 31204161323, 1038495626543, 40831064063651, 1770543222362221, 80392862250956443, 3974705945770003271, 220497651647226035923, 13563377141298566879867
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OFFSET
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1,2
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FORMULA
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a(n) = numerator[ Sum[ k/Prime[k], {k,1,n}]].
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MATHEMATICA
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Numerator[Table[Sum[i/Prime[i], {i, 1, n}], {n, 1, 20}]]
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CROSSREFS
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Sequence in context: A015561 A133588 A081338 this_sequence A057180 A137612 A092802
Adjacent sequences: A120269 A120270 A120271 this_sequence A120273 A120274 A120275
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KEYWORD
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frac,nonn
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AUTHOR
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Alexander Adamchuk (alex(AT)kolmogorov.com), Jul 01 2006
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