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

A292214

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

Terms

    a(0) =0a(1) =1a(2) =1a(3) =2a(4) =5a(5) =12a(6) =33a(7) =90a(8) =261a(9) =765a(10) =2309a(11) =7058a(12) =21932a(13) =68843a(14) =218378a(15) =698268a(16) =2249370a(17) =7291072a(18) =23766308a(19) =77850244a(20) =256141505a(21) =846090860a(22) =2804864997a(23) =9328658392a(24) =31118365152a(25) =104086821258a(26) =349029100890

External references