Canon Permutation Posets

A permutation of the multiset $\{1^m,2^m,\dots,n^m\}$ is a canon permutation if the subsequence formed by the $j$th copy of each element of $[n]:=\{1,2,\dots,n\}$ is identical for all $j\in[m]$. Canon permutations were introduced by Elizalde and are motivated by pattern-avoiding concepts such as (qu