$F_{10}$
$${\rm LOG}\left(F_{10}\right)=\frac{1}{5}\pi
\left[\begin{array}{rrrrrrrrrr}
\bullet & \bullet & \bullet & \bullet & \bullet & \bullet & \bullet & \bullet & \bullet & \bullet\\
\bullet & 1 & 2 & 3 & 4 & 5 & 6 & 7 & 8 & 9\\
\bullet & 2 & 4 & 6 & 8 & \bullet & 2 & 4 & 6 & 8\\
\bullet & 3 & 6 & 9 & 2 & 5 & 8 & 1 & 4 & 7\\
\bullet & 4 & 8 & 2 & 6 & \bullet & 4 & 8 & 2 & 6\\
\bullet & 5 & \bullet & 5 & \bullet & 5 & \bullet & 5 & \bullet & 5\\
\bullet & 6 & 2 & 8 & 4 & \bullet & 6 & 2 & 8 & 4\\
\bullet & 7 & 4 & 1 & 8 & 5 & 2 & 9 & 6 & 3\\
\bullet & 8 & 6 & 4 & 2 & \bullet & 8 & 6 & 4 & 2\\
\bullet & 9 & 8 & 7 & 6 & 5 & 4 & 3 & 2 & 1
\end{array}\right]$$