Some maths

I want to double each week the numbers of cars. Let’s play double or nothing and we have 250 cars at october 25.

Week Red
(175)
Black
(75)
Total
(250)
Week 1 sep 8-14 4 5 9
Week 2 sep 15-21 5 (8) 4 (10) 18
Week 3 sep 22-28 .. (16) .. (20) 36
Week 4 sep 29 – oct 5 .. (32) .. (40) 72
Week 5 oct 5 – oct 11 .. (64) .. (75) 139
Week 6 oct 12 – oct 18 .. (128) .. (75) 203
Week 7 oct 19 – oct 25 .. (175) .. (75) 250