Number of n-node trees of height at most 5.

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =4a(5) =9a(6) =20a(7) =47a(8) =108a(9) =252a(10) =582a(11) =1345a(12) =3086a(13) =7072a(14) =16121a(15) =36667a(16) =83099a(17) =187885a(18) =423610a(19) =953033a(20) =2139158a(21) =4792126a(22) =10714105a(23) =23911794a(24) =53273599a(25) =118497834a(26) =263164833a(27) =583582570a(28) =1292276355a(29) =2857691087