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A079076
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Numerator of Sum{n/d : 1<d<n and n mod d > 0}.
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1
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0, 0, 3, 4, 65, 27, 203, 236, 3489, 2845, 53471, 21341, 757913, 553973, 619181, 1040164, 29169263, 16276383, 193614199, 116220883, 32925391, 10628013, 320160667, 455451475, 22987116115, 19980510667, 193553388003, 154777722503
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,3
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FORMULA
| p divides a(p^k) for prime p and integer k>1. p divides a(p), a(2p) and a(2p^2) for prime p>2. - Alexander Adamchuk (alex(AT)kolmogorov.com), Jul 27 2006
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MATHEMATICA
| f[n_] := Block[{s = 0, d = 1}, While[d < n, If[ Mod[n, d] != 0, s = s + n/d]; d++ ]; s]; Numerator[ Table[ f[n], {n, 1, 28}]]
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CROSSREFS
| Denominator = A027611. Cf. A049820, A024816.
Sequence in context: A067093 A041105 A196442 * A060356 A052323 A012087
Adjacent sequences: A079073 A079074 A079075 * A079077 A079078 A079079
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KEYWORD
| nonn,frac
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AUTHOR
| Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Dec 21 2002
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EXTENSIONS
| Edited and extended by Robert G. Wilson v (rgwv(AT)rgwv.com), Dec 30 2002
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