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

A318854

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

Terms

    a(0) =0a(1) =1a(2) =1a(3) =2a(4) =4a(5) =9a(6) =20a(7) =48a(8) =115a(9) =285a(10) =717a(11) =1837a(12) =4753a(13) =12451a(14) =32878a(15) =87549a(16) =234654a(17) =632813a(18) =1715444a(19) =4672539a(20) =12780498a(21) =35091807a(22) =96684475a(23) =267223388a(24) =740690724a(25) =2058468456a(26) =5734614714a(27) =16011714554a(28) =44799497491a(29) =125587597952

External references