Number of labeled digraphs where every node has indegree 0 or outdegree 0 and no isolated nodes.
A052332
Number of labeled digraphs where every node has indegree 0 or outdegree 0 and no isolated nodes.
Terms
- a(0) =1a(1) =0a(2) =2a(3) =6a(4) =50a(5) =510a(6) =7682a(7) =161406a(8) =4747010a(9) =194342910a(10) =11084390402a(11) =881008805886
External references
- oeis: A052332