},\end{aligned}$$  $$\begin{aligned} &\Omega_{\{0,0,0\}}^{(0,0)}[(0,0,0),(0,0,0)]=\sum_{i_0,\cdots,i_0,j_0,\cdots, j_0}a_{i_0,j_0}^0a_{i_0,j_0}^0a_{i_0,j_0}^0a_{i_0,j_0}^0\\\notag &={{\rm Diag}}'({\mathbf}B) {\left(}{\mathbf}A{\circ}{\mathbf}A{\right)}{\left(}{\mathbf}A{\circ}{\mathbf}A{\right)}'{