Number of ternary rooted trees with n nodes and height at most 6.

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =4a(5) =8a(6) =17a(7) =38a(8) =82a(9) =177a(10) =376a(11) =789a(12) =1638a(13) =3376a(14) =6894a(15) =13987a(16) =28181a(17) =56424a(18) =112282a(19) =222171a(20) =437098a(21) =855311a(22) =1664755a(23) =3223402a(24) =6209505a(25) =11901967a(26) =22700056a(27) =43083657a(28) =81376732a(29) =152971812