$F_{14}$
$${\rm LOG}\left(F_{14}\right)=\frac{1}{7}\pi
\left[\begin{array}{rrrrrrrrrrrrrr}
\bullet & \bullet & \bullet & \bullet & \bullet & \bullet & \bullet & \bullet & \bullet & \bullet & \bullet & \bullet & \bullet & \bullet\\
\bullet & 1 & 2 & 3 & 4 & 5 & 6 & 7 & 8 & 9 & 10 &11 &12 & 13\\
\bullet & 2 & 4 & 6 & 8 & 10 & 12 & \bullet & 2 & 4 & 6& 8 &10 & 12\\
\bullet & 3 & 6 & 9 & 12 & 1& 4 & 7 & 10 & 13 &2 &5 & 8 & 11\\
\bullet & 4 & 8 & 12 & 2 & 6 & 10 & \bullet & 4 & 8 &12 &2 & 6 & 10\\
\bullet & 5 & 10 & 1 & 6 & 11 & 2 & 7 & 12 & 3 &8 &13 & 4 & 9\\
\bullet & 6 & 12 & 4 & 10 & 2 & 8 & \bullet & 6 & 12 &4 &10 & 2 & 8\\
\bullet & 7 & \bullet & 7 & \bullet & 7 & \bullet & 7 & \bullet & 7 & \bullet & 7 & \bullet & 7\\
\bullet & 8 & 2 & 10 & 4 & 12 & 6 & \bullet & 8 & 2 &10 &4 & 12 & 6\\
\bullet & 9 & 4 & 13 & 8 & 3 & 12 & 7 & 2 & 11 &6 &1 & 10 & 5\\
\bullet & 10 & 6 & 2 & 12 & 8 & 4 & \bullet & 10 & 6 &2 &12 & 8 & 4\\
\bullet & 11 & 8 & 5 & 2 & 13 & 10 & 7 & 4 & 1 &12 &9 & 6 & 3\\
\bullet & 12 & 10 & 8 & 6 & 4 & 2 & \bullet & 12 & 10& 8 &6 & 4 & 2\\
\bullet & 13 & 12 & 11 & 10 & 9 & 8 & 7 & 6 & 5 & 4 & 3 & 2 & 1
\end{array}\right]$$