Triangle read by rows giving number of rooted labeled trees with n >= 2 nodes and height d >= 1.

Terms

a(0) =2a(1) =3a(2) =6a(3) =4a(4) =36a(5) =24a(6) =5a(7) =200a(8) =300a(9) =120a(10) =6a(11) =1170a(12) =3360a(13) =2520a(14) =720a(15) =7a(16) =7392a(17) =38850a(18) =43680a(19) =22680a(20) =5040a(21) =8a(22) =50568a(23) =475776a(24) =757680a(25) =551040a(26) =221760a(27) =40320a(28) =9a(29) =372528