摘要
In this note, only rooted maps are considered. Let N be the set of all the rooted nonseparable outerplanar maps. For N∈N, let v=v(N) be the rooted vertex, r=r(N) the rooted edge, m(N) the valency of v, and n_i(N) (i≥1) the number of non-root-vertices of valency i. Moreover, we should mention that the vertex map which consists of only one vertex without edges and the link map which has only one edge with distinct
