Number of topologies on n labeled points satisfying the T_4 axiom.
A006056
Number of topologies on n labeled points satisfying the T_4 axiom.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =26a(4) =255a(5) =3642a(6) =75606a(7) =2316169a(8) =106289210a(9) =7321773414a(10) =748425136289
External references
- oeis: A006056