Number of 9-level labeled rooted trees with n leaves.
A081629
Number of 9-level labeled rooted trees with n leaves.
Terms
- a(0) =1a(1) =1a(2) =9a(3) =117a(4) =1989a(5) =41709a(6) =1038975a(7) =29947185a(8) =979687005a(9) =35839643175
External references
- oeis: A081629