I'm not sure exactly what you're asking, but I THINK I understand-- and here's the answer. . .
You are going to do row 1 (which is mostly purled, except for the first and last stitch, which are knit, and no increases) and then row 2, which is all knit, except for the increases right after the first and right before the last stitches. Then you do row 1 again, then row 2 again, then row 1 again, then row 2 again, etc., until your total stitch count is 15.
Then switch to these 2 rows and keep going until the piece is 3.5" long:
Row 1. K1, P13, K1
Row 2. K15