On 120-avoiding inversion and ascent sequences

03/26/2020

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by   Zhicong Lin, et al.

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Recently, Yan and the first named author investigated systematically the enumeration of inversion or ascent sequences avoiding vincular patterns of length 3, where two of the three letters are required to be adjacent. They established many connections with familiar combinatorial families and proposed several interesting conjectures. The objective of this paper is to address two of their conjectures concerning the enumeration of 120-avoiding inversion or ascent sequences.