Number of rooted ordered trees with n non-root nodes such that the branch lengths are weakly decreasing.

A246566

Number of rooted ordered trees with n non-root nodes such that the branch lengths are weakly decreasing.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =4a(4) =10a(5) =24a(6) =62a(7) =155a(8) =396a(9) =992a(10) =2504a(11) =6228a(12) =15512a(13) =38220a(14) =94059a(15) =229498a(16) =558642a(17) =1350384a(18) =3255138a(19) =7801327a(20) =18642118a(21) =44329833a(22) =105111283a(23) =248184255a(24) =584396849a(25) =1371048495a(26) =3208318247a(27) =7483522231a(28) =17413665881a(29) =40405120865

External references