Number of non-isomorphic phylogenetic trees with n nodes.

Terms

a(0) =0a(1) =1a(2) =1a(3) =1a(4) =2a(5) =2a(6) =4a(7) =5a(8) =9a(9) =14a(10) =24a(11) =39a(12) =69a(13) =116a(14) =205a(15) =357a(16) =632a(17) =1118a(18) =2001a(19) =3576a(20) =6445a(21) =11627a(22) =21080a(23) =38293a(24) =69819a(25) =127539a(26) =233644a(27) =428825a(28) =788832a(29) =1453589