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

A318860

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

Terms

    a(0) =0a(1) =1a(2) =1a(3) =3a(4) =9a(5) =23a(6) =60a(7) =164a(8) =443a(9) =1209a(10) =3319a(11) =9150a(12) =25326a(13) =70335a(14) =195870a(15) =546823a(16) =1529935a(17) =4288662a(18) =12042447a(19) =33866604a(20) =95373852a(21) =268925258a(22) =759157224a(23) =2145298117a(24) =6068251826a(25) =17180172176a(26) =48680092670a(27) =138041661905a(28) =391725281701

External references