Roulette system uses the Fibonacci number series basically. This series of numbers (sequence) sequence yet know the sages of the ancient world. It is named after the mathematician.
The number series of the system is as follows:
1_ 1 _ 2 _ 3 _ 5 _ 8 _ 13 _ 2 _ 34 _ 55 _ 89 _ 144_ 233 _ 377 _ 610 _ 987 _ 1597 _ 2584 ... Previous number is the sum of the two preceding numbers. This sequence can continue almost indefinitely, but usually for the game lacks the above numbers.