Number of non-isomorphic T_0 set-systems covering a subset of {1..n} that are closed under intersection.
A327013
Number of non-isomorphic T_0 set-systems covering a subset of {1..n} that are closed under intersection.
Terms
- a(0) =1a(1) =2a(2) =3a(3) =6a(4) =23a(5) =282a(6) =28033
External references
- oeis: A327013