Number of 7-element ordered antichains on an unlabeled n-element set; T_1-hypergraphs with 7 labeled nodes and n hyperedges.
A056073
Number of 7-element ordered antichains on an unlabeled n-element set; T_1-hypergraphs with 7 labeled nodes and n hyperedges.
Terms
- a(0) =20580a(1) =9209340a(2) =1113220168a(3) =64271300556
External references
- oeis: A056073