Shown with a cast-on count of 37 stitches.  

• Row 1 (RS): P1, *k2tog, k3, yo, k1, yo, k3, ssk, p1, repeat from *.
• Rows 2, 4, 6, and 8: K1, *p11, k1, repeat from *.
• Row 3: P1, *k2tog, k2, yo, k3, yo, k2, ssk, p1, repeat from *.
• Row 5: P1, *k2tog, k1, yo, k5, yo, k1, ssk, p1, repeat from *.
• Row 7: P1, *k2tog, yo, k7, yo, ssk, p1, repeat from *.
• Row 9: K1, *yo, k3, ssk, p1, k2tog, k3, yo, k1, repeat from *.
• Rows 10, 12, 14, and 16: P6, *k1, p11, repeat from * to last 7 sts, k1, p6.
• Row 11: K2, *yo, k2, ssk, p1, k2tog, k2, yo, k3, repeat from * to last 11 sts, yo, k2, ssk, p1, k2tog, k2, yo, k2.
• Row 13: K3, *yo, k1, ssk, p1, k2tog, k1, yo, k5, repeat from * to last 10 sts, yo, k1, ssk, p1, k2tog, k1, yo, k3.
• Row 15: K4, *yo, ssk, p1, k2tog, yo, k7, repeat from * to last 9 sts, yo, ssk, p1, k2tog, yo, k4.