Number of tree-rooted planar maps with 4 vertices and n faces and no isthmuses.
A006433
Number of tree-rooted planar maps with 4 vertices and n faces and no isthmuses.
Terms
- a(0) =0a(1) =4a(2) =175a(3) =3324a(4) =42469a(5) =429120a(6) =3711027a(7) =28723640a(8) =204598130a(9) =1366223880a(10) =8664086470a(11) =52673351080a(12) =309164754285
External references
- oeis: A006433