Number of rooted planar binary unlabeled trees with n leaves and caterpillar index <= 5.

A214203

Number of rooted planar binary unlabeled trees with n leaves and caterpillar index <= 5.

Terms

    a(0) =0a(1) =1a(2) =1a(3) =2a(4) =5a(5) =14a(6) =26a(7) =100a(8) =333a(9) =1110a(10) =3742a(11) =12764a(12) =44258a(13) =154636a(14) =544660a(15) =1932360a(16) =6900029a(17) =24780390a(18) =89445174a(19) =324326060a(20) =1180834390a(21) =4315287140a(22) =15823305516a(23) =58200045432a(24) =214672363410a(25) =793883691004

External references