Number of unlabelled unary-binary trees with n nodes such that every node with two children has children of different subtree sizes.

A335562

Number of unlabelled unary-binary trees with n nodes such that every node with two children has children of different subtree sizes.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =3a(4) =5a(5) =13a(6) =29a(7) =71a(8) =165a(9) =421a(10) =1029a(11) =2647a(12) =6593a(13) =17241a(14) =43801a(15) =115555a(16) =297513a(17) =791337a(18) =2062737a(19) =5516755a(20) =14497373a(21) =38994597a(22) =103269053a(23) =278921927a(24) =742950845a(25) =2014648253a(26) =5396210357a(27) =14677306503a(28) =39477832745a(29) =107701409665

External references