Number of composite unlabeled T_0 topologies (i.e., composite T_0 homeomorphism classes) on n points.
A028850
Number of composite unlabeled T_0 topologies (i.e., composite T_0 homeomorphism classes) on n points.
Terms
- a(0) =0a(1) =0a(2) =3a(3) =0a(4) =10a(5) =0a(6) =30a(7) =15a(8) =126a(9) =0
External references
- oeis: A028850