安规律把数填完整21,24,24,24,27,24,30,24,33,(),().

问题描述:

安规律把数填完整21,24,24,24,27,24,30,24,33,(),().

24,36
奇数项为21,24,27,30,33,36
偶数项为24,24,24,24,24,24