Number of non-crossing antichains of nonempty subsets of {1,...,n}.
A324168
Number of non-crossing antichains of nonempty subsets of {1,...,n}.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =19a(4) =120a(5) =1084a(6) =11783a(7) =141110a(8) =1791156a(9) =23646352a(10) =321220257a(11) =4459886776a(12) =63000867229a(13) =902528825332
External references
- oeis: A324168