\documentclass[crop,border=2mm]{standalone}

\usepackage{amsfonts, amsmath, amssymb}

\begin{document}
\begin{tabular}{l}
{\huge type B3, s=0, subset=[2, 3]}\\ \\


$\displaystyle
\begin{array}{r|l l l l l l}
	{\scriptstyle i+j=0}&\mathbb{C}&&&&&\\
	{\scriptstyle i+j=2}&\mathbb{C}&\mathbb{C}&&&&\\
	{\scriptstyle i+j=4}&\mathbb{C}&\mathbb{C}&\mathbb{C}&&&\\
	{\scriptstyle i+j=6}&\mathbb{C}&\mathbb{C}L_{1,1,1}&\mathbb{C}L_{1,1,1}&\mathbb{C}&&\\
	{\scriptstyle i+j=8}&\mathbb{C}&\mathbb{C}&\mathbb{C}L_{1,1,1}&\mathbb{C}&\mathbb{C}&\\
	{\scriptstyle i+j=10}&\mathbb{C}&\mathbb{C}&\mathbb{C}&\mathbb{C}&\mathbb{C}&\mathbb{C}\\
	\hline h^{i,j}&{\scriptstyle j-i=0}&{\scriptstyle j-i=2}&{\scriptstyle j-i=4}&{\scriptstyle j-i=6}&{\scriptstyle j-i=8}&{\scriptstyle j-i=10}
\end{array}
$ \\ \\


$\displaystyle
\begin{array}{r|l l l l l l}
	{\scriptstyle i+j=0}&1&&&&&\\
	{\scriptstyle i+j=2}&1&1&&&&\\
	{\scriptstyle i+j=4}&1&1&1&&&\\
	{\scriptstyle i+j=6}&1&8&8&1&&\\
	{\scriptstyle i+j=8}&1&1&8&1&1&\\
	{\scriptstyle i+j=10}&1&1&1&1&1&1\\
	\hline h^{i,j}&{\scriptstyle j-i=0}&{\scriptstyle j-i=2}&{\scriptstyle j-i=4}&{\scriptstyle j-i=6}&{\scriptstyle j-i=8}&{\scriptstyle j-i=10}
\end{array}
$ \\ \\


$\displaystyle
\begin{array}{rll}
	\text{module}&\text{multiplicity}&\text{dimension} \\ \hline \text{all}&&42 \\
	\mathbb{C}&21&1\\
	L\left(\alpha_{1}+\alpha_{2}+\alpha_{3}\right)&3&7
\end{array}
$ \\ \\

\end{tabular}
\end{document}
