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The number of inversion sequences avoiding two patterns and is known to be the same as the number of permutations avoiding three patterns , , and . This sequence also counts the number of Schröder paths without triple descents, restricted bicolored Dyck paths, -avoiding inversion sequences, and weighted ordered trees. We provide bijections to integrate them together by introducing -paths. Moreover, we define three kinds of statistics for each of the objects and count the number of each object with respect to these statistics. We also discuss direct sums of each object.

生成讲解博客的中文版本

生成AI智能校验的中文版本