Number of ternary rooted trees with n nodes and height at most 4.

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =4a(5) =7a(6) =12a(7) =20a(8) =31a(9) =47a(10) =70a(11) =99a(12) =137a(13) =184a(14) =239a(15) =300a(16) =369a(17) =432a(18) =498a(19) =551a(20) =594a(21) =614a(22) =624a(23) =601a(24) =570a(25) =514a(26) =453a(27) =378a(28) =312a(29) =238