Shown with a cast-on count of 4 stitches.  

• Row 1 (RS): Knit.
• Row 2: Knit.
• Row 3: K2, yo, k2 (5 sts).
• Row 4: K2, (k1, p1, k1) in next st, k2 (7 sts).
• Row 5: K2, yo, k1, yo, k1, yo, k1, yo, k2 (11 sts).
• Rows 6 and 8: K2, purl to last 2 sts, k2.
• Row 7: K2, k1, yo, k1, yo, k1, k1, k1, yo, k1, yo, k1, k2 (15 sts).