Number of ordered 3-multiantichains on an n-set.
A092881
Number of ordered 3-multiantichains on an n-set.
Terms
- a(0) =1a(1) =2a(2) =10a(3) =74a(4) =730a(5) =8282a(6) =92170a(7) =959114a(8) =9359290a(9) =86810042a(10) =775127530a(11) =6729173354a(12) =57217937050a(13) =479099439002
External references
- oeis: A092881