Number of T_0 set-systems covering a subset of {1..n} that are closed under intersection.
A326959
Number of T_0 set-systems covering a subset of {1..n} that are closed under intersection.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =22a(4) =297a(5) =20536a(6) =16232437
External references
- oeis: A326959