The layout on the wheel in French Roulette is intentionally designed to spread out, as much as possible, winning sets of numbers.
The most obvious design layout is the colors. Starting after the position of the green zero, the first number is red 32 followed by black 15. This alternating red black positioning attempts to separate those even money bets in order to equalize the number winning bets on a particular color.
Since the Even/Odd bet also pays out 1:1, these numbers also alternate around the wheel. While zero is not technically an even or odd number, it is followed by the even number 32. On the opposite side of the zero is also an even number 26.
This seems curious. While it does not change the outcome of the game, the zero is “on the surface” more of an even number than an odd number. In counting sequentially, you would go 0 1 2 3 4 and so on. Notice that an odd number follows zero. Given this, it would seem more logical for an odd number to follow the zero on the French Roulette wheel.
Numbers on the Wheel
The sequence of numbers on the French roulette wheel are 0, 32, 15, 19, 4, 21, 2, 25, 17, 34, 6, 27, 13, 36, 11, 30, 8, 23, 10, 5, 24, 16, 33, 1, 20, 14, 31, 9, 22, 18, 29, 7, 28, 12, 35, 3, 26