Number of digraphs on n unlabeled nodes in which every node belongs to a directed cycle.
A361586
Number of digraphs on n unlabeled nodes in which every node belongs to a directed cycle.
Terms
- a(0) =1a(1) =0a(2) =1a(3) =5a(4) =90a(5) =5289a(6) =1071691a(7) =712342075
External references
- oeis: A361586