Number of different digraphs on n unlabeled nodes which are not graphs.

A127909

Number of different digraphs on n unlabeled nodes which are not graphs.

Terms

    a(0) =0a(1) =0a(2) =1a(3) =12a(4) =207a(5) =9574a(6) =1540788a(7) =882032396

External references