Number of closure operators on a set of n elements which satisfy the T_0 separation axiom.
A334252
Number of closure operators on a set of n elements which satisfy the T_0 separation axiom.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =44a(4) =2179a(5) =1362585a(6) =75953166947
External references
- oeis: A334252