Number of 2n-node unlabeled rooted trees with thinning limbs and root outdegree (branching factor) n.

A244712

Number of 2n-node unlabeled rooted trees with thinning limbs and root outdegree (branching factor) n.

Terms

    a(0) =0a(1) =1a(2) =1a(3) =3a(4) =6a(5) =15a(6) =31a(7) =74a(8) =159a(9) =365a(10) =805a(11) =1819a(12) =4041a(13) =9091a(14) =20274a(15) =45474a(16) =101644a(17) =227755a(18) =509559a(19) =1141446a(20) =2555232a(21) =5723626a(22) =12817678a(23) =28713594a(24) =64319189a(25) =144104857a(26) =322867573a(27) =723482538a(28) =1621264326a(29) =3633487621

External references