Number of rooted trees with n nodes such that nine equals the maximal number of isomorphic subtrees extending from the same node.

A318866

Number of rooted trees with n nodes such that nine equals the maximal number of isomorphic subtrees extending from the same node.

Terms

    a(0) =0a(1) =1a(2) =1a(3) =3a(4) =8a(5) =22a(6) =60a(7) =167a(8) =465a(9) =1306a(10) =3682a(11) =10423a(12) =29597a(13) =84309a(14) =240735a(15) =688941a(16) =1975403a(17) =5673911a(18) =16322021a(19) =47018394a(20) =135613559a(21) =391590017a(22) =1131902426a(23) =3274897873a(24) =9483405008a(25) =27483957321a(26) =79710659583a(27) =231340894684a(28) =671840776074

External references