摘要 : <正> In computer science one often encounters ordered trees. In Ref. [1] an algorithm is designed to generate all binary trees with n vertices. In [2] there is a slightly different approach to binary trees and ordered trees in gen... 展开 <正> In computer science one often encounters ordered trees. In Ref. [1] an algorithm is designed to generate all binary trees with n vertices. In [2] there is a slightly different approach to binary trees and ordered trees in general. In these and other papers sequences of integers related to ordered trees are of importance. 收起