Number of prime unlabeled connected T_0 topologies (i.e., prime T_0 connected homeomorphism classes) on n points.
A028858
Number of prime unlabeled connected T_0 topologies (i.e., prime T_0 connected homeomorphism classes) on n points.
Terms
- a(0) =1a(1) =3a(2) =9a(3) =44a(4) =235a(5) =1650a(6) =14502a(7) =163335a(8) =2360675a(9) =43944974
External references
- oeis: A028858