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