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On permutations avoiding the dashed patterns 32-41 and 41-32 (1405.2064v1)
Published 8 May 2014 in math.CO
Abstract: We show that permutations of size $n$ avoiding both of the dashed patterns 32-41 and 41-32 are equinumerous with indecomposable set partitions of size $n+1$, and deduce a related result.