\begin{table}%t1
%\centering
\par
\caption{\label{tab_al2}Eigenvalues of the fundamental dipolar mode and the fifth and tenth overtones of the $\al^2$-sphere.}
\begin{tabular}{cccc}
\hline\hline\noalign{\smallskip}
\rule[0.0mm]{0mm}{2.2mm} $n_{\rm max}$ & $\lam_0$ & $\lam_5$ & $\lam_{10}$ \\
\hline
 4 & $-$0.0241 & $-$116.936 \\
 8 & $-$0.0034 & $-$115.110 & $-$349.489 \\
12 & $-$0.0010 & $-$115.058 & $-$349.097 \\
16 & $-$0.0004 & $-$115.047 & $-$349.050 \\
20 & $-$0.0002 & $-$115.043 & $-$349.036 \\
24 & $-$0.0001 & $-$115.041 & $-$349.031 \\
28 & $-$0.0001 & $-$115.040 & $-$349.028 \\
32 & $-$0.0000 & $-$115.040 & $-$349.026 \\
36 & $-$0.0000 & $-$115.039 & $-$349.026 \\
\hline
HvG93 & 0.0000 & $-$115.04 & $-$349.02 \\
\hline
\end{tabular}
\vspace*{-1mm}
\end{table}