Table 2 Illustration of number of possible BNs with constraints on connectivity

R _n →

$\left[\begin{array}{c}\hfill 0\hfill \\ \hfill 0\hfill \end{array}\right]$

$\left[\begin{array}{c}\hfill 0\hfill \\ \hfill 1\hfill \end{array}\right]$

$\left[\begin{array}{c}\hfill 1\hfill \\ \hfill 0\hfill \end{array}\right]$

$\left[\begin{array}{c}\hfill 1\hfill \\ \hfill 1\hfill \end{array}\right]$