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

Author

Robert G. Wilson v, Aug 27 2002

Keywords

• easy
• frac
• nonn

Crossrefs

The denominators are in A051540.

Cf. A075135.

Programs

Mathematica

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