This paper reveals that Euler numbers and Dai Xu numbers are more relevant and inseparable function to each other when they are compared with Bernoulli numbers and Euler numbers.

• 对欧拉数、戴煦数与齿排列的关系进行研究,揭示了欧拉数与戴煦数都是一对相辅相成、难解难分的函数,比伯努利数与欧拉数的关系更进一步;