On permutations avoiding 1324, 2143, and another 4-letter pattern
und | 14. Juli 2017
Über diesen Artikel
Online veröffentlicht: 14. Juli 2017
Seitenbereich: 1 - 10
Eingereicht: 07. Juni 2016
DOI: https://doi.org/10.1515/puma-2015-0018
Schlüsselwörter
© 2017
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.
We enumerate permutations avoiding 1324, 2143, and a third 4-letter pattern τ a step toward the goal of enumerating avoiders for all triples of 4-letter patterns. The enumeration is already known for all but five patterns τ, which are treated in this paper.