Number of unlabeled rooted trees with n vertices such that every branch of the root has a different number of nodes.

A298539

Number of unlabeled rooted trees with n vertices such that every branch of the root has a different number of nodes.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =3a(4) =6a(5) =15a(6) =35a(7) =89a(8) =218a(9) =571a(10) =1446a(11) =3834a(12) =10003a(13) =26864a(14) =71120a(15) =193602a(16) =519409a(17) =1423539a(18) =3865590a(19) =10666555a(20) =29185905a(21) =81078369a(22) =223367624a(23) =623192655a(24) =1727907182a(25) =4840616872a(26) =13482957335a(27) =37923616139a(28) =106070402639a(29) =299214369115

External references