Number of rooted trees with n nodes such that no more than three subtrees of the same size extend from the same node.

A318797

Number of rooted trees with n nodes such that no more than three subtrees of the same size extend from the same node.

Terms

    a(0) =0a(1) =1a(2) =1a(3) =2a(4) =4a(5) =8a(6) =18a(7) =43a(8) =102a(9) =250a(10) =623a(11) =1579a(12) =4042a(13) =10470a(14) =27350a(15) =72034a(16) =190956a(17) =509259a(18) =1365271a(19) =3677522a(20) =9947145a(21) =27007988a(22) =73582758a(23) =201103314a(24) =551190098a(25) =1514683667a(26) =4172470962a(27) =11519509386a(28) =31869341642a(29) =88337853393

External references