Number of forests of rooted plane binary trees (all nodes have outdegree of 0 or 2) with n total nodes.

A222006

Number of forests of rooted plane binary trees (all nodes have outdegree of 0 or 2) with n total nodes.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =2a(4) =2a(5) =4a(6) =5a(7) =10a(8) =12a(9) =27a(10) =35a(11) =79a(12) =104a(13) =244a(14) =331a(15) =789a(16) =1083a(17) =2615a(18) =3652a(19) =8880a(20) =12523a(21) =30657a(22) =43661a(23) =107326a(24) =153985a(25) =379945a(26) =548776a(27) =1357922a(28) =1972153a(29) =4892140

External references