I'm trying to replicate the following table:
At first I was thinking of making it by dividing all the content into single cells, but since there are those numbers enclosed in curly brackets, I told myself it was not very convenient (especially considering the numbers on the left of each curly bracket are actually vertically aligned). Then I thought of dividing the table into "groups" of cells
\documentclass{article}
\usepackage{multirow}
\usepackage{amsmath}
\title{Table}
\author{Dude}
\begin{document}
\begin{table}[]
\centering
\begin{tabular}{|l|l|l|l|}
\hline
\multicolumn{1}{|c|}{I} & \multicolumn{1}{c|}{\multirow{2}{*}{II}} & \multicolumn{1}{c|}{\multirow{2}{*}{III}} & \multicolumn{1}{c|}{\multirow{2}{*}{IV}} \\ \cline{1-1}
n \qquad l \qquad m & \multicolumn{1}{c|}{} & \multicolumn{1}{c|}{} & \multicolumn{1}{c|}{} \\ \hline
\multirow{5}{*}{1} & \multirow{14}{*}{} & 1 orbitale & 1 \\ \cline{3-4}
& & 1 orbitale & \multirow{4}{*}{4} \\
& & \multirow{3}{*}{3 orbitali} & \\
& & & \\
& & & \\ \cline{1-1} \cline{3-4}
\multirow{9}{*}{3} & & 1 orbitale & \multirow{9}{*}{9} \\
& & \multirow{3}{*}{3 orbitali} & \\
& & & \\
& & & \\
& & \multirow{5}{*}{5 orbitali} & \\
& & & \\
& & & \\
& & & \\
& & & \\ \hline
\end{tabular}
\end{table}
\end{document}
, artificially make the n, l, m columns with \qquad and then handle the aligned stuff using the align environment. However, pdfTeX immediately throws out an error saying I can't use it inside a tabular environment. So now I'm stuck.
Any help on how to proceed would be appreciated. Thank you
P.S.: the reason I thought about using the align environment is because I need the braces of the original pic and I also need the numbers aligned.
