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math.NT2016
Generalized Vandermonde Determinants and Characterization of Divisibility Sequences
Stefano Barbero
We present a different proof of the characterization of non--degenerate recurrence sequences, which are also divisibility sequences, given by Van der Poorten, Bezevin, and Petho in…
math.NT2016
The Biharmonic mean
Marco Abrate, Stefano Barbero, Umberto Cerruti +1
We briefly describe some well-known means and their properties, focusing on the relationship with integer sequences. In particular, the harmonic numbers, deriving from the harmonic…