Shown with a cast-on count of 73 stitches.  

• Rows 1 and 17 (RS): Purl.
• Rows 2, 6, 8, 10, 12, 14, 16, 18, 20, and 22: Purl.
• Row 3: K1, *yo, p4, k2tog, k11, ssk, p4, yo, k1, repeat from *.
• Row 5 (RS): K2, *yo, p4, k2tog, k9, ssk, p4, yo, k3, repeat from * to last 23 sts, yo, p4, k2tog, k9, ssk, p4, yo, k2.
• Row 7: K3, *yo, p4, k2tog, k7, ssk, p4, yo, k5, repeat from * to last 22 sts, yo, p4, k2tog, k7, ssk, p4, yo, k3.
• Row 9: K4, *yo, p4, k2tog, k5, ssk, p4, yo, k7, repeat from * to last 21 sts, yo, p4, k2tog, k5, ssk, p4, yo, k4.
• Row 11: K5, *yo, p4, k2tog, k3, ssk, p4, yo, k9, repeat from * to last 20 sts, yo, p4, k2tog, k3, ssk, p4, yo, k5.
• Row 13: K6, *yo, p4, k2tog, k1, ssk, p4, yo, k11, repeat from * to last 19 sts, yo, p4, k2tog, k1, ssk, p4, yo, k6.
• Row 15: K7, *yo, p4, sl2-k1-p2sso, p4, yo, k13, repeat from * to last 18 sts, yo, p4, sl2-k1-p2sso, p4, yo, k7.
• Rows 19 and 21: Knit.
• Repeat rows 1-22.