Triangle T(n,d) read by rows: the number of mixed trees with n>=1 nodes and 0<=d<n arcs.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =3a(6) =2a(7) =5a(8) =10a(9) =8a(10) =3a(11) =12a(12) =32a(13) =40a(14) =27a(15) =6a(16) =30a(17) =99a(18) =178a(19) =187a(20) =91a(21) =11a(22) =74a(23) =298a(24) =692a(25) =1019a(26) =854a(27) =350a(28) =23a(29) =188