What is the law of 3, - 1,11, - 25,83, - 241?

What is the law of 3, - 1,11, - 25,83, - 241?

3-(-1)=4
11-(-1)=12
11-(-25)=36
83-(-25)=108
83-(-241)=324
The rule is that the odd number minus the adjacent even number multiplied by 3 is the value of the next number. Just pay attention to the positive and negative numbers