大家的思路不对,应该这样理解
按前3个条件向下算:
1 = 4
2 = 8
3 = 16
4 = 32
5 = 64
6 = 128
7 = 256
8 = 512
“风飞落霞”你说的是这个意思吧?但你4到7的规律又乱了.吃饭先