Triangle read by rows: T(n,k) is the number of noncrossing trees with n edges and k leaves at level 1.
A101371
Triangle read by rows: T(n,k) is the number of noncrossing trees with n edges and k leaves at level 1.
Terms
- a(0) =1a(1) =0a(2) =1a(3) =2a(4) =0a(5) =1a(6) =7a(7) =4a(8) =0a(9) =1a(10) =34a(11) =14a(12) =6a(13) =0a(14) =1a(15) =171a(16) =72a(17) =21a(18) =8a(19) =0a(20) =1a(21) =905a(22) =370a(23) =114a(24) =28a(25) =10a(26) =0a(27) =1a(28) =4952a(29) =1995
External references
- oeis: A101371