来自侯春聿的问题
安规律把数填完整21,24,24,24,27,24,30,24,33,(),().
安规律把数填完整21,24,24,24,27,24,30,24,33,(),().


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