Number of labeled 2,3 cacti (triangular cacti with bridges).
A091485
Number of labeled 2,3 cacti (triangular cacti with bridges).
Terms
- a(0) =1a(1) =1a(2) =4a(3) =28a(4) =290a(5) =3996a(6) =68992a(7) =1434112a(8) =34895772a(9) =973450000a(10) =30636233936
External references
- oeis: A091485