*************SPOILERS*********************
The "permutations" are as follow. But, basically the ends are similar...it's what evolves "after word" that makes the outcome differ. You'll see what I mean by reading of the following.
Ending One: Ray escapes with Lucy or Dektora.
> Ray escapes in ground car with Lucy, who is human
> Ray escapes in ground car with Lucy, who is a Replicant. He has obtained the DNA sequencing data and therefore has a chance of saving Replicants from their four-year life span limit.
> Ray escapes in ground car with Dektora, who is a Replicant. He has no DNA data and therefore can not reconstruct her DNA to shit-off the four year limit. They don't know how long they'll have, but they are together, and free.
> Ray escapes in ground car with Dektora, who is a Replicant. He has obtained the DNA sequencing...
Ending Two:
> Clovis is dead on the moonbus floor. Next to him is Gaff's origami.
Ending Three:
> Ray is unable to save Dektora from Crystal and escapes alone in ground car.
> Ray is unable to save Lucy from Crystal and escapes alone in ground car.
Ending Four
> Ray escapes in the moonbus with Clovis and Lucy
> Ray escapes in the moonbus with Clovis and Dektora.
> Ray escapes in the moonbus with only Clovis.
Ending Five:
> Ray and Crystal walk off into the kipple together.
Ending Six:
> Ray and Gaff are alone in the kipple.
Total of thirteen.