Associated Stirling Eulerian Numbers and Their q-Analogues
Imboa-Navalona Manjaka Rakotoson and Fanja Rakotondrajao
Department of Mathematics and Computer Science
Antananarivo University
101 Antananarivo
Madagascar
Abstract:
In this paper, we study the excedance distribution over permutations while
considering the parameters of cycle length and the number of cycles. We
refer to the number of such permutations as the associated Stirling
Eulerian number. Moreover, if we consider the permutations in which
the first s integers are in different cycles, we denote their count
as the associated s-Stirling Eulerian number. We provide a
formula defining these numbers, along with their generating functions. We
establish q-analogues and offer extensions of the results.
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Received September 26 2023; revised versions received
April 17 2024; September 2 2024; August 11 2025.
Published in Journal of Integer Sequences,
September 21 2025.
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