Number of n-node unlabeled rooted trees with thickening limbs and root outdegree (branching factor) 3.

A245143

Number of n-node unlabeled rooted trees with thickening limbs and root outdegree (branching factor) 3.

Terms

    a(0) =1a(1) =0a(2) =0a(3) =1a(4) =1a(5) =1a(6) =3a(7) =3a(8) =5a(9) =9a(10) =12a(11) =17a(12) =32a(13) =42a(14) =64a(15) =106a(16) =157a(17) =232a(18) =379a(19) =563a(20) =866a(21) =1362a(22) =2081a(23) =3186a(24) =5028a(25) =7710a(26) =11924a(27) =18659a(28) =28938a(29) =44842

External references