Number of (unlabeled) rooted trees with n leaf nodes and without unary nodes such that the maximum of the node outdegrees equals three.
A292229
Number of (unlabeled) rooted trees with n leaf nodes and without unary nodes such that the maximum of the node outdegrees equals three.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =17a(4) =47a(5) =133a(6) =380a(7) =1096a(8) =3186a(9) =9351a(10) =27618a(11) =82168a(12) =245882a(13) =740003a(14) =2238186a(15) =6801375a(16) =20754977a(17) =63583715a(18) =195486605a(19) =603003882a(20) =1865692570a(21) =5788676649a(22) =18007192835a(23) =56151236196a(24) =175486946089a(25) =549586009252
External references
- oeis: A292229