Number of rooted binary MUL-trees with n leaves on the label set [3].
A220816
Number of rooted binary MUL-trees with n leaves on the label set [3].
Terms
- a(0) =3a(1) =6a(2) =18a(3) =75a(4) =333a(5) =1620a(6) =8208a(7) =43188a(8) =232947a(9) =1282824a(10) =7178598a(11) =40711158a(12) =233445483a(13) =1351255608a(14) =7884677052a(15) =46330220604a(16) =273905815095
External references
- oeis: A220816