Number of rooted trees of n vertices in which all leaves are at even depths (distances down from the root).
A337089
Number of rooted trees of n vertices in which all leaves are at even depths (distances down from the root).
Terms
- a(0) =0a(1) =1a(2) =0a(3) =1a(4) =1a(5) =3a(6) =4a(7) =10a(8) =17a(9) =38a(10) =73a(11) =158a(12) =324a(13) =700a(14) =1483a(15) =3224a(16) =6979a(17) =15300a(18) =33571a(19) =74219a(20) =164476a(21) =366302a(22) =817999a(23) =1833280a(24) =4119266a(25) =9281867a(26) =20962757a(27) =47453359a(28) =107637494a(29) =244630449
External references
- oeis: A337089