Number of labeled essential directed acyclic graphs (DAGs).
A026586
Number of labeled essential directed acyclic graphs (DAGs).
Terms
- a(0) =1a(1) =1a(2) =1a(3) =4a(4) =59a(5) =2616a(6) =306117a(7) =87716644a(8) =58874478231
External references
- oeis: A026586