Number of rooted binary leaf-multilabeled trees with n leaves on the label set [4].
A220821
Number of rooted binary leaf-multilabeled trees with n leaves on the label set [4].
Terms
- a(0) =0a(1) =0a(2) =0a(3) =15a(4) =240a(5) =2604a(6) =24180a(7) =207732a(8) =1710108a(9) =13739550a(10) =108853512a(11) =855732465a(12) =6700902804a(13) =52395480996a(14) =409733313444
External references
- oeis: A220821