Sums of r-Lah numbers and r-Lah polynomials
Keywords:Summed r-Lah numbers, r-Lah polynomials
The total number of partitions of a finite set into nonempty ordered subsets such that r distinguished elements belong to distinct ordered blocks can be described as sums of r-Lah numbers. In this paper we study this possible variant of Bell-like numbers, as well as the related r-Lah polynomials.
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