Triangle read by rows: T(n,k) is the number of series-reduced planted trees with n leaves and k internal nodes.
A106179
Triangle read by rows: T(n,k) is the number of series-reduced planted trees with n leaves and k internal nodes.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =2a(6) =1a(7) =3a(8) =5a(9) =3a(10) =1a(11) =4a(12) =10a(13) =12a(14) =6a(15) =1a(16) =5a(17) =16a(18) =29a(19) =28a(20) =11a(21) =1a(22) =6a(23) =24a(24) =57a(25) =84a(26) =66a(27) =23a(28) =1a(29) =7
External references
- oeis: A106179