Number of ordered 4-multiantichains on an n-set.
A092882
Number of ordered 4-multiantichains on an n-set.
Terms
- a(0) =1a(1) =2a(2) =18a(3) =206a(4) =3690a(5) =91742a(6) =2493738a(7) =63266366a(8) =1449722250a(9) =30406367582a(10) =595643428458
External references
- oeis: A092882