Triangle read by rows: T(n,k) is the number of noncrossing trees with root degree equal to k.

Terms

a(0) =1a(1) =2a(2) =1a(3) =7a(4) =4a(5) =1a(6) =30a(7) =18a(8) =6a(9) =1a(10) =143a(11) =88a(12) =33a(13) =8a(14) =1a(15) =728a(16) =455a(17) =182a(18) =52a(19) =10a(20) =1a(21) =3876a(22) =2448a(23) =1020a(24) =320a(25) =75a(26) =12a(27) =1a(28) =21318a(29) =13566