Shown with a cast-on count of 23 stitches.  

• Row 1 (RS): P3, *yo, k2tog, k5, p3, repeat from *.
• Rows 2, 4, 6, 8, 10, 12, 14, and 16: *K3, p7, repeat from * to last 3 sts, k3.
• Row 3: P3, *k1, yo, k2tog, k4, p3, repeat from *.
• Row 5: P3, *k2, yo, k2tog, k3, p3, repeat from *.
• Row 7: P3, *k3, yo, k2tog, k2, p3, repeat from *.
• Row 9: P3, *k5, k2tog, yo, p3, repeat from *.
• Row 11: P3, *k4, k2tog, yo, k1, p3, repeat from *.
• Row 13: P3, *k3, k2tog, yo, k2, p3, repeat from *.
• Row 15: P3, *k2, k2tog, yo, k3, p3, repeat from *.