Shown with a cast-on count of 32 stitches.  

• Row 1 (RS): P32.
• Row 2 (RS): P15, *ctr dbl inc, repeat from * to last 15 sts, p15 (36 sts).
• Row 3 (RS): P15, *ctr dbl inc, repeat from * to last 15 sts, p15 (48 sts).
• Row 4 (RS): P15, *ctr dbl inc, repeat from * to last 15 sts, p15 (84 sts).
• Row 5 (RS): P15, *cddp, repeat from * to last 15 sts, p15 (48 sts).
• Row 6 (RS): P15, *cddp, repeat from * to last 15 sts, p15 (36 sts).
• Row 7 (RS): P15, *cddp, repeat from * to last 15 sts, p15 (32 sts).