\begin{table}[H]
    \setlength\extrarowheight{-6pt}
    \begin{tabular}{c|cccccccccc}
        $n/k$ & 0 & 1 & 2  & 3  & 4  & 5  & 6  & 7  & 8 & 9 \\
        \hline
        0     & 1 &   &    &    &    &    &    &    &   &   \\
        1     & 1 & 1 &    &    &    &    &    &    &   &   \\
        2     & 1 & 2 & 1  &    &    &    &    &    &   &   \\
        3     & 1 & 3 & 3  & 1  &    &    &    &    &   &   \\
        4     & 1 & 4 & 6  & 4  & 1  &    &    &    &   &   \\
        5     & 1 & 5 & 10 & 10 & 5  & 1  &    &    &   &   \\
        6     & 1 & 6 & 15 & 19 & 15 & 6  & 1  &    &   &   \\
        7     & 1 & 7 & 21 & 31 & 31 & 21 & 7  & 1  &   &   \\
        8     & 1 & 8 & 28 & 46 & 53 & 46 & 28 & 8  & 1 &   \\
        9     & 1 & 9 & 36 & 64 & 81 & 81 & 64 & 36 & 9 & 1
    \end{tabular}
    \caption{Rascal triangle R2. Sequence \href{https://oeis.org/A374378}{\texttt{A374378}}
    in OEIS~\cite{oeis_iterated_rascal_triangle_r2}.}
    \label{tab:r2-triangle}
\end{table}