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A074599
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Numerator of 2 * H(n,2,1), a generalized harmonic number. See A075135. Also 2 * A025550.
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7
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2, 8, 46, 352, 1126, 13016, 176138, 182144, 3186538, 62075752, 63461422, 1488711776, 7577414602, 23104065256, 680057071574, 21372905414144, 21646396991594, 21904260478904, 819482859775298, 828045249930848
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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MATHEMATICA
| Table[ Numerator[ Sum[1/i, {i, 1/2, n}]], {n, 1, 20}]
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CROSSREFS
| The denominators are in A025547.
Cf. A025550, A075135.
Contribution from Johannes W. Meijer (meijgia(AT)hotmail.com), Jun 08 2009: (Start)
Not always equal to the second left hand column of A161198 triangle divided by A025549.
(End)
Sequence in context: A128085 A052801 A180390 * A007289 A099765 A096656
Adjacent sequences: A074596 A074597 A074598 * A074600 A074601 A074602
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KEYWORD
| easy,frac,nonn
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AUTHOR
| Robert G. Wilson v (rgwv(AT)rgwv.com), Aug 27 2002
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