\begin{table}%tA.3
\caption{\label{tab:t3}Values of $C^{22}_{ll'{mm'}}$.}
%\centering
\small
\begin{tabular}{c|cccccc}
\hline \hline
 mm$'$/\ $ll'$ & 2, 0 & 2, 1 & 2, 2 & 1, 1 & 1, 2 & 0, 2 \\ 
 \hline
%&&&&&& \\[-8pt]
2, 0  & $\frac{1}{\sqrt{4\pi}}$ & 0 & $-\frac{1}{\sqrt{4\pi}}~\frac{\sqrt{20}}{7}$ & 0 & 0  & 0  \\ 1, 1  & 0 & 0 & $\frac{1}{\sqrt{4\pi}}~\frac{\sqrt{30}}{7}$ &  $\frac{1}{\sqrt{4\pi}}$ &  0 & 0  \\ 0, 2   & 0 & 0 & $-\frac{1}{\sqrt{4\pi}}~\frac{\sqrt{20}}{7}$ &  0 &  0 & $\frac{1}{\sqrt{4\pi}}$ \\[4pt] 
\hline
\end{tabular}
\par
\end{table}