Number of ordered rooted trees with n non-root nodes and all outdegrees <= eight.

A291823

Number of ordered rooted trees with n non-root nodes and all outdegrees <= eight.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =5a(4) =14a(5) =42a(6) =132a(7) =429a(8) =1430a(9) =4861a(10) =16785a(11) =58708a(12) =207557a(13) =740520a(14) =2662812a(15) =9640581a(16) =35112513a(17) =128563215a(18) =472951884a(19) =1747233370a(20) =6479450415a(21) =24111470952a(22) =90006390290a(23) =336953657070

External references