Number of hybrid 9-ary trees with n internal nodes.
A245052
Number of hybrid 9-ary trees with n internal nodes.
Terms
- a(0) =1a(1) =2a(2) =35a(3) =885a(4) =26264a(5) =852909a(6) =29347189a(7) =1051325430a(8) =38798085127
External references
- oeis: A245052