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

A320222

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

Terms

    a(0) =1a(1) =1a(2) =2a(3) =4a(4) =9a(5) =18a(6) =39a(7) =78a(8) =161a(9) =324a(10) =658a(11) =1316a(12) =2657a(13) =5314a(14) =10668a(15) =21347a(16) =42777a(17) =85554a(18) =171290a(19) =342580a(20) =685498a(21) =1371037a(22) =2742733a(23) =5485466a(24) =10972351a(25) =21944711a(26) =43892080a(27) =87784323a(28) =175574004a(29) =351148008

External references