A074596 Numerator of 3 * H(n,3,1), a generalized harmonic number. See A075135.

3, 15, 117, 627, 8571, 35649, 699171, 7898361, 40404717, 41219817, 1300637127, 22464584559, 843217244283, 854342788713, 7181761691859, 864748487122557, 6116114629522299, 6175362432667599, 6231378537459519, 182250420468103851

Offset

1,1

Links

Table of n, a(n) for n=1..20.

Mathematica

Table[ Numerator[ Sum[1/i, {i, 1/3, n}]], {n, 1, 20}]

Crossrefs

The denominators are in A051536.

Cf. A075135.

Sequence in context: A346272 A190629 A341647 * A087806 A245043 A225109

Adjacent sequences: A074593 A074594 A074595 * A074597 A074598 A074599

Keyword

easy,frac,nonn

Author

Robert G. Wilson v, Aug 27 2002

Status

approved