Number of unlabeled rooted phylogenetic trees with n (leaf-) nodes such that for each inner node all children are either leaves or roots of distinct subtrees.

A300660

Number of unlabeled rooted phylogenetic trees with n (leaf-) nodes such that for each inner node all children are either leaves or roots of distinct subtrees.

Terms

    a(0) =0a(1) =1a(2) =1a(3) =2a(4) =3a(5) =6a(6) =13a(7) =30a(8) =72a(9) =182a(10) =467a(11) =1222a(12) =3245a(13) =8722a(14) =23663a(15) =64758a(16) =178459a(17) =494922a(18) =1380105a(19) =3867414a(20) =10884821a(21) =30756410a(22) =87215419a(23) =248117618a(24) =707952902a(25) =2025479210a(26) =5809424605a(27) =16700811214a(28) =48113496645a(29) =138884979562

External references