TeX source:

\begin{array}{|l|llll} 0 & 9 & & & \\ 1 & 3 & 6 & 6 & 8\\ 2 & 1 & 2 & 3 & 5 & 6 & 9 \\ 3 & 0 & & & & && \\ 4 & 1 & 2 & 3 & 3 & 5& 7 \end{array}