Number of unlabeled digraphs with n arcs and a global source (or sink).

A350798

Number of unlabeled digraphs with n arcs and a global source (or sink).

Terms

    a(0) =1a(1) =1a(2) =2a(3) =6a(4) =21a(5) =84a(6) =387a(7) =1953a(8) =10802a(9) =64267a(10) =408489a(11) =2750686a(12) =19518841a(13) =145236878a(14) =1128884559a(15) =9135566309a(16) =76758391212a(17) =667993213393

External references