Number of series/singleton-reduced rooted trees on strongly normal multisets of size n whose leaves are sets (not necessarily disjoint).
A330628
Number of series/singleton-reduced rooted trees on strongly normal multisets of size n whose leaves are sets (not necessarily disjoint).
Terms
- a(0) =1a(1) =1a(2) =1a(3) =5a(4) =42a(5) =423a(6) =5458a(7) =80926
External references
- oeis: A330628