Image sequence confusion...

Okay, so I rendered out a PNG sequence in After Effects, let’s say I used frames 160 to 311. When I import this sequence into Blender (trying to get frame 160 to act as frame 1 in my render) it’s all messed up.

I know I have to adjust start frame and offset, but all my attempts aren’t working

Number of images of movie to use: 151
Start: 1 ?
Offset: ?

Can somebody help me the math on this thing. Thanks!