JOURNAL OF NUMBER THEORY, cilt.130, sa.2, ss.360-369, 2010 (SCI-Expanded)
We show that the sum of the series formed by the so-called hyperharmonic numbers can be expressed in terms of the Riemann zeta function. These results enable us to reformulate Euler's formula involving the Hurwitz zeta function. In additon, we improve Conway and Guy's formula for hyperharmonic numbers. (C) 2009 Elsevier Inc. All rights reserved.