ratio, weight
6, 4
12, 12
25, 6
50, 6
100, 6
200, 6
400, 4
800, 8
1600, 16
3200, 4
6400, 16
12800, 21
25600, 15
102400, 10
204800, 18
819200, 4
1638400, 10
2147483647, 3