\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}