Number of preferential arrangements (or hierarchical orderings) on the disconnected graphs on n unlabeled nodes.
A139415
Number of preferential arrangements (or hierarchical orderings) on the disconnected graphs on n unlabeled nodes.
Terms
- a(0) =0a(1) =0a(2) =2a(3) =8a(4) =40a(5) =208a(6) =1408a(7) =12224a(8) =157312a(9) =3478528a(10) =147761664a(11) =12592434176
External references
- oeis: A139415