Triangular array read by rows: T(n,k) is the number of rooted identity trees with n nodes having exactly k subtrees from the root.
A227774
Triangular array read by rows: T(n,k) is the number of rooted identity trees with n nodes having exactly k subtrees from the root.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =2a(6) =1a(7) =3a(8) =3a(9) =6a(10) =5a(11) =1a(12) =12a(13) =11a(14) =2a(15) =25a(16) =22a(17) =5a(18) =52a(19) =49a(20) =12a(21) =113a(22) =104a(23) =28a(24) =2a(25) =247a(26) =232a(27) =65a(28) =4a(29) =548
External references
- oeis: A227774