Number of 5-ary rooted trees with n nodes and height exactly 3.

Terms

a(0) =0a(1) =0a(2) =0a(3) =1a(4) =2a(5) =4a(6) =6a(7) =10a(8) =12a(9) =16a(10) =19a(11) =23a(12) =25a(13) =29a(14) =30a(15) =32a(16) =32a(17) =32a(18) =30a(19) =29a(20) =25a(21) =23a(22) =19a(23) =16a(24) =12a(25) =10a(26) =7a(27) =5a(28) =3a(29) =2