Geodesic
Sums of r-Lah numbers and r-Lah polynomials
Ars Mathematica Contemporanea, Tome 18 (2020) no. 2, pp. 211-222.

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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.
DOI : 10.26493/1855-3974.1793.c4d
Keywords: Summed r-Lah numbers, r-Lah polynomials 
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Gábor Nyul; Gabriella Rácz. Sums of r-Lah numbers and r-Lah polynomials. Ars Mathematica Contemporanea, Tome 18 (2020) no. 2, pp. 211-222. doi : 10.26493/1855-3974.1793.c4d. http://geodesic.mathdoc.fr/articles/10.26493/1855-3974.1793.c4d/

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