A074597 Numerator of 3 * H(n,3,2), a generalized harmonic number. See A075135.

3, 21, 99, 1209, 9123, 164331, 34437, 823467, 11066355, 330317679, 1355321733, 990324351, 19205317149, 802205873349, 815985479709, 38957620226163, 197637723726063, 10617280487243739, 75264900895382073

Offset

1,1

Links

Table of n, a(n) for n=1..19.

Mathematica

Table[ Numerator[ Sum[1/i, {i, 2/3, n}]], {n, 1, 20}]

Crossrefs

The denominators are in A051540.

Cf. A075135.

Sequence in context: A264246 A144883 A362567 * A350726 A241795 A289399

Adjacent sequences: A074594 A074595 A074596 * A074598 A074599 A074600

Keyword

easy,frac,nonn

Author

Robert G. Wilson v, Aug 27 2002

Status

approved