Let $\emptyset$ be the D13: Empty set.
The Von Neumann ordinal sequence is the D62: Sequence
\begin{equation}
\emptyset, \quad
\mathcal{P}(\emptyset), \quad
\mathcal{P}(\mathcal{P}(\emptyset)), \quad
\mathcal{P}(\mathcal{P}(\mathcal{P}(\emptyset))), \quad
\ldots
\end{equation}