Number of 6-element ordered antichains on an unlabeled n-element set; T_1-hypergraphs with 6 labeled nodes and n hyperedges.
A056071
Number of 6-element ordered antichains on an unlabeled n-element set; T_1-hypergraphs with 6 labeled nodes and n hyperedges.
Terms
- a(0) =30a(1) =8340a(2) =780242a(3) =29813578a(4) =657271645a(5) =10037038800a(6) =117733967666
External references
- oeis: A056071