Number of unlabeled 6-gonal cacti having n polygons.
A054368
Number of unlabeled 6-gonal cacti having n polygons.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =4a(4) =25a(5) =187a(6) =1772a(7) =17880a(8) =191967a(9) =2141232a(10) =24640989a(11) =290610414a(12) =3498042924a(13) =42831369777a(14) =532148952720
External references
- oeis: A054368