\documentclass{report}
\usepackage{fullpage}
\begin{document}
\begin{tabular}{ r | *{120}{c} }
0 & 7 & 7 \\
1 & 2 & 3 & 8 & 8 \\
2 & 3 & 5 & 7 & 7 & 7 & 7 & 7 & 7 & 8 & 8 & 9 & 9 \\
...
13 & 1 & 2 & 3 & 9 \\
14 & 1
\end{tabular}
\end{document}