Number of rooted trees of n vertices in which all leaves are at odd depths (distances down from the root).

A337090

Number of rooted trees of n vertices in which all leaves are at odd depths (distances down from the root).

Terms

    a(0) =0a(1) =0a(2) =1a(3) =1a(4) =2a(5) =3a(6) =6a(7) =11a(8) =22a(9) =43a(10) =89a(11) =183a(12) =384a(13) =812a(14) =1738a(15) =3742a(16) =8125a(17) =17735a(18) =38941a(19) =85898a(20) =190328a(21) =423320a(22) =944933a(23) =2115941a(24) =4752138a(25) =10701191a(26) =24157460a(27) =54658278a(28) =123930534a(29) =281546031

External references