% This picture represents the 26-nodes diagram
% (C) Thiago Brevidelli
\begin{tikzpicture}
    % Draw the nodes
    \foreach \i in {1,2,3,4,5,6,7,8,9,10,11,12,13}
    \foreach \offset in {0,1}
    \filldraw ({(360/26) * (2 * (\i - 1) + \offset}:3) circle (2pt);
    
    % Draw the ralations between nodes
    \foreach \i in {1,2,3,4,5,6,7,8,9,10,11,12,13}
    \draw ({(360/26) * 2 * (\i - 1)}:3) -- ({(360/26) * (2 * (\i - 1) + 1)}:3)
          ({(360/26) * 2 * (\i - 1)}:3) -- ({(360/26) * (2 * (\i - 2) + 1)}:3)
          ({(360/26) * 2 * (\i - 1)}:3) -- ({(360/26) * (2 * (\i - 5) + 1)}:3)
          ({(360/26) * 2 * (\i - 1)}:3) -- ({(360/26) * (2 * (\i - 7) + 1)}:3);
\end{tikzpicture}
