Possible numbers of complements of topologies on 4 points.
A018195
Possible numbers of complements of topologies on 4 points.
Terms
- a(0) =1a(1) =3a(2) =4a(3) =7a(4) =12a(5) =14a(6) =15a(7) =16
External references
- oeis: A018195
A018195
Possible numbers of complements of topologies on 4 points.