Number of unlabeled acyclic digraphs with n arcs and a global source.

A350490

Number of unlabeled acyclic digraphs with n arcs and a global source.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =5a(4) =15a(5) =50a(6) =191a(7) =795a(8) =3625a(9) =17781a(10) =93319a(11) =519732a(12) =3056185a(13) =18880345a(14) =122066437a(15) =823118881a(16) =5772473719a(17) =41995743085a(18) =316258151517

External references