Number of hybrid 7-ary trees with n internal nodes.
A245050
Number of hybrid 7-ary trees with n internal nodes.
Terms
- a(0) =1a(1) =2a(2) =27a(3) =521a(4) =11764a(5) =290305a(6) =7585749a(7) =206294771a(8) =5778015219a(9) =165541098701
External references
- oeis: A245050