Shown with a cast-on count of 69 stitches.  

• Rows 1, 3, and 5 (RS): Knit.
• Rows 2, 4, and 6: Knit.
• Row 7: K7, *k3tog, [yo, k1] 3 times, yo, sl1-k2tog-psso, k14, repeat from * to last 16 sts, k3tog, [yo, k1] 3 times, yo, sl1-k2tog-psso, k7.
• Row 8: K7, *p9, k14, repeat from * to last 16 sts, p9, k7.
• Row 9: K5, *k3tog, [k1, yo] twice, k3, [yo, k1] twice, sl1-k2tog-psso, k10, repeat from * to last 18 sts, k3tog, [k1, yo] twice, k3, [yo, k1] twice, sl1-k2tog-psso, k5.
• Row 10: K5, *p13, k10, repeat from * to last 18 sts, p13, k5.
• Row 11: K3, *k3tog, k2, yo, k1, yo, k5, yo, k1, yo, k2, sl1-k2tog-psso, k6, repeat from * to last 20 sts, k3tog, k2, yo, k1, yo, k5, yo, k1, yo, k2, sl1-k2tog-psso, k3.
• Row 12: K3, *p17, k6, repeat from * to last 20 sts, p17, k3.
• Row 13: K1, *k3tog, k3, yo, k1, yo, k7, yo, k1, yo, k3, sl1-k2tog-psso, k2, repeat from * to last 22 sts, k3tog, k3, yo, k1, yo, k7, yo, k1, yo, k3, sl1-k2tog-psso, k1.
• Row 14: K1, *p21, k2, repeat from * to last 22 sts, p21, k1.
• Row 15: *K2tog, k4, yo, k11, yo, k4, ssk, repeat from *.
• Row 16: Purl.
• Repeat rows 1-16.