Number of (unlabeled) rooted trees with n leaf nodes and without unary nodes or outdegrees larger than nine.

A292215

Number of (unlabeled) rooted trees with n leaf nodes and without unary nodes or outdegrees larger than nine.

Terms

    a(0) =0a(1) =1a(2) =1a(3) =2a(4) =5a(5) =12a(6) =33a(7) =90a(8) =261a(9) =766a(10) =2311a(11) =7065a(12) =21955a(13) =68921a(14) =218640a(15) =699161a(16) =2252410a(17) =7301482a(18) =23802026a(19) =77973162a(20) =256565366a(21) =847555502a(22) =2809934472a(23) =9346232579a(24) =31179372180a(25) =104298865434a(26) =349766936468

External references