Number of (unlabeled) rooted trees with n leaf nodes and without unary nodes or outdegrees larger than five.

A292211

Number of (unlabeled) rooted trees with n leaf nodes and without unary nodes or outdegrees larger than five.

Terms

    a(0) =0a(1) =1a(2) =1a(3) =2a(4) =5a(5) =12a(6) =32a(7) =87a(8) =251a(9) =733a(10) =2201a(11) =6696a(12) =20705a(13) =64681a(14) =204183a(15) =649738a(16) =2082939a(17) =6719063a(18) =21796084a(19) =71052001a(20) =232645645a(21) =764768959a(22) =2523033061a(23) =8350789334a(24) =27721841968a(25) =92277902858a(26) =307935654094

External references