Number of composite unlabeled connected topologies (i.e., composite connected homeomorphism classes) on n points.
A028851
Number of composite unlabeled connected topologies (i.e., composite connected homeomorphism classes) on n points.
Terms
- a(0) =0a(1) =0a(2) =3a(3) =0a(4) =12a(5) =0a(6) =40a(7) =21a(8) =188a(9) =0
External references
- oeis: A028851