Number of unlabeled 9-gonal 2-trees with n 9-gons.
A094653
Number of unlabeled 9-gonal 2-trees with n 9-gons.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =5a(4) =32a(5) =343a(6) =4505a(7) =66603a(8) =1045335a(9) =17115162a(10) =289107854a(11) =5007144433a(12) =88516438360
External references
- oeis: A094653