TeX source:

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