Number of unlabeled rooted trees with n nodes and maximal outdegree (branching factor) 4.

A244400

Number of unlabeled rooted trees with n nodes and maximal outdegree (branching factor) 4.

Terms

    a(0) =1a(1) =2a(2) =6a(3) =17a(4) =49a(5) =136a(6) =386a(7) =1081a(8) =3044a(9) =8549a(10) =24052a(11) =67642a(12) =190426a(13) =536205a(14) =1510920a(15) =4259418a(16) =12014682a(17) =33907056a(18) =95740913a(19) =270468869a(20) =764450150a(21) =2161638413a(22) =6115252839a(23) =17307553766a(24) =49005101669a(25) =138811296158a(26) =393351362321

External references