Number of trees with n nodes and 8 leaves.

Terms

a(0) =1a(1) =4a(2) =16a(3) =60a(4) =202a(5) =626a(6) =1787a(7) =4755a(8) =11848a(9) =27881a(10) =62265a(11) =132769a(12) =271431a(13) =534358a(14) =1016390a(15) =1873983a(16) =3358043a(17) =5862811a(18) =9993697a(19) =16664380a(20) =27227873a(21) =43658180a(22) =68789775a(23) =106640700a(24) =162829982a(25) =245127960a(26) =364155076a(27) =534285064a(28) =774774427