Number of topologies on n labeled points satisfying axioms T_0-T_4.
A006057
Number of topologies on n labeled points satisfying axioms T_0-T_4.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =16a(4) =137a(5) =1826a(6) =37777a(7) =1214256a(8) =60075185a(9) =4484316358a(10) =493489876721
External references
- oeis: A006057