Number of unlabeled series-reduced rooted trees with n nodes where the non-leaf branches directly under any given node are all equal.

A320268

Number of unlabeled series-reduced rooted trees with n nodes where the non-leaf branches directly under any given node are all equal.

Terms

    a(0) =1a(1) =0a(2) =1a(3) =1a(4) =2a(5) =3a(6) =6a(7) =9a(8) =16a(9) =26a(10) =44a(11) =70a(12) =119a(13) =189a(14) =314a(15) =506a(16) =830a(17) =1336a(18) =2186a(19) =3522a(20) =5737a(21) =9266a(22) =15047a(23) =24313a(24) =39444a(25) =63759a(26) =103322a(27) =167098a(28) =270616a(29) =437714

External references