Number of orderings of the subsets of a set with n elements that are compatible with the subsets' sizes; i.e., if A, B are two subsets with A <= B then Card(A) <= Card(B).
A051459
Number of orderings of the subsets of a set with n elements that are compatible with the subsets' sizes; i.e., if A, B are two subsets with A <= B then Card(A) <= Card(B).
Terms
- a(0) =1a(1) =1a(2) =2a(3) =36a(4) =414720
External references
- oeis: A051459