Number of 5-element ordered antichains on an unlabeled n-element set; T_1-hypergraphs with 5 labeled nodes and n hyperedges.
A056070
Number of 5-element ordered antichains on an unlabeled n-element set; T_1-hypergraphs with 5 labeled nodes and n hyperedges.
Terms
- a(0) =30a(1) =2206a(2) =56242a(3) =766198a(4) =7056249a(5) =49662920a(6) =286860862a(7) =1422695104a(8) =6246302316a(9) =24810260818a(10) =90593318410a(11) =307833736038a(12) =982717917851
External references
- oeis: A056070