On nonsemiassociativity of polyadic operation $\eta_{s, \sigma, k}$

Sufficient conditions of nonsemiassociativity of a polyadic operation $\eta_{s, \sigma, k}$ which is determined on a Cartesian power $A^k$ of $n$-ary $\langle A,\eta\rangle$ semigroup with substitution $\sigma$ of a range $\{1,\dots,k\}$ and $n$-ary operation $\eta$ are found.