Number of rooted binary perfect phylogenies with sample size n and 4 leaves.

Terms

a(0) =2a(1) =4a(2) =10a(3) =17a(4) =30a(5) =44a(6) =66a(7) =90a(8) =124a(9) =160a(10) =208a(11) =259a(12) =324a(13) =392a(14) =476a(15) =564a(16) =670a(17) =780a(18) =910a(19) =1045a(20) =1202a(21) =1364a(22) =1550a(23) =1742a(24) =1960a(25) =2184a(26) =2436a(27) =2695a(28) =2984a(29) =3280