Triangle read by rows: T(n,k) is number of ordered trees with n edges and having exactly k vertices all of whose children are leaves (1<=k<=floor(n/2) for n>=2).

A114502

Triangle read by rows: T(n,k) is number of ordered trees with n edges and having exactly k vertices all of whose children are leaves (1<=k<=floor(n/2) for n>=2).

Terms

    a(0) =1a(1) =2a(2) =5a(3) =13a(4) =1a(5) =34a(6) =8a(7) =89a(8) =42a(9) =1a(10) =233a(11) =183a(12) =13a(13) =610a(14) =717a(15) =102a(16) =1a(17) =1597a(18) =2622a(19) =624a(20) =19a(21) =4181a(22) =9134a(23) =3275a(24) =205a(25) =1a(26) =10946a(27) =30691a(28) =15473a(29) =1650

External references