Number of unlabeled rooted trees with n vertices such that every branch of the root has a different number of leaves.

A298535

Number of unlabeled rooted trees with n vertices such that every branch of the root has a different number of leaves.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =2a(4) =5a(5) =13a(6) =32a(7) =80a(8) =200a(9) =511a(10) =1323a(11) =3471a(12) =9183a(13) =24491a(14) =65715a(15) =177363a(16) =481135a(17) =1311340a(18) =3589023a(19) =9860254a(20) =27181835a(21) =75165194a(22) =208439742a(23) =579522977a(24) =1615093755a(25) =4511122964a(26) =12625881944a(27) =35405197065a(28) =99459085125a(29) =279861792874

External references