Shown with a cast-on count of 29 stitches.  

• Row 1 (RS): K3, yo, k2tog, yo, k1, yo, ssk, k2, yo, ssk, k7, k2tog, yo, k2, k2tog, yo, k1, yo, k2tog, yo, k1 (31 sts).
• Rows 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, and 40: Purl.
• Row 3: K3, yo, k2tog, k1, yo, k1, yo, k1, ssk, k2, yo, ssk, k5, k2tog, yo, k2, k2tog, k1, yo, k1, yo, k1, ssk, yo, k1 (33 sts).
• Row 5: K3, yo, k2tog, k2, yo, k1, yo, k2, ssk, k2, yo, ssk, k3, k2tog, yo, k2, k2tog, k2, yo, k1, yo, k2, ssk, yo, k1 (35 sts).
• Row 7: K3, yo, k2tog, k3, yo, k1, yo, k3, ssk, k2, yo, ssk, k1, ssk, yo, k2, ssk, k3, yo, k1, yo, k3, ssk, yo, k1 (37 sts).
• Row 9: K3, yo, k2tog, k4, yo, k1, yo, k4, ssk, k2, yo, sl1-k2tog-psso, yo, k2, ssk, k4, yo, k1, yo, k4, ssk, yo, k1 (39 sts).
• Row 11: K3, yo, k2tog, k2, k2tog, yo, k1, yo, k1, yo, k1, yo, ssk, k2, ssk, k5, k2tog, k2, k2tog, yo, k1, yo, k1, yo, k1, yo, ssk, k2, ssk, yo, k1 (41 sts).
• Row 13: K3, yo, k2tog, k3, yo, k2tog, k1, yo, k1, yo, k1, ssk, yo, k3, ssk, k3, k2tog, k3, yo, k2tog, k1, yo, k1, yo, k1, ssk, yo, k3, ssk, yo, k1 (43 sts).
• Row 15: K3, yo, k2tog, k3, yo, k2tog, k2, yo, k1, yo, k2, ssk, yo, k3, ssk, k1, k2tog, k3, yo, k2tog, k2, yo, k1, yo, k2, ssk, yo, k3, ssk, yo, k1 (45 sts).
• Row 17: K3, yo, k5, yo, k2tog, k3, yo, k1, yo, k3, ssk, yo, k3, sl1-k2tog-psso, k3, yo, k2tog, k3, yo, k1, yo, k3, ssk, yo, k5, yo, k1 (49 sts).
• Row 19: K3, yo, k2tog, [yo, k1, yo, ssk, k2, yo, ssk, k7, k2tog, yo, k2, k2tog] twice, yo, k1, yo, ssk, yo, k1 (51 sts).
• Row 21: K3, yo, k2tog, k1, [yo, k1, yo, k1, ssk, k2, yo, ssk, k5, k2tog, yo, k2, k2tog, k1] twice, yo, k1, yo, k1, ssk, yo, k1 (53 sts).
• Row 23: K3, yo, k2tog, k2, [yo, k1, yo, k2, ssk, k2, yo, ssk, k3, k2tog, yo, k2, k2tog, k2] twice, yo, k1, yo, k2, ssk, yo, k1 (55 sts).
• Row 25: K3, yo, k2tog, k3, [yo, k1, yo, k3, ssk, k2, yo, ssk, k1, ssk, yo, k2, ssk, k3] twice, yo, k1, yo, k3, ssk, yo, k1 (57 sts).
• Row 27: K3, yo, k2tog, k4, [yo, k1, yo, k4, ssk, k2, yo, sl1-k2tog-psso, yo, k2, ssk, k4] twice, yo, k1, yo, k4, ssk, yo, k1 (59 sts).
• Row 29: K3, yo, k2tog, k2, k2tog, yo, k1, [yo, k1, yo, k1, yo, ssk, k2, ssk, k5, k2tog, k2, k2tog, yo, k1] twice, yo, k1, yo, k1, yo, ssk, k2, ssk, yo, k1 (61 sts).
• Row 31: K3, yo, k2tog, k3, yo, k2tog, k1, [yo, k1, yo, k1, ssk, yo, k3, ssk, k3, k2tog, k3, yo, k2tog, k1] twice, yo, k1, yo, k1, ssk, yo, k3, ssk, yo, k1 (63 sts).
• Row 33: K3, yo, k2tog, k3, yo, k2tog, k2, [yo, k1, yo, k2, ssk, yo, k3, ssk, k1, k2tog, k3, yo, k2tog, k2] twice, yo, k1, yo, k2, ssk, yo, k3, ssk, yo, k1 (65 sts).
• Row 35: K3, yo, k5, yo, k2tog, k3, [yo, k1, yo, k3, ssk, yo, k3, sl1-k2tog-psso, k3, yo, k2tog, k3] twice, yo, k1, yo, k3, ssk, yo, k5, yo, k1 (69 sts).
• Row 38: Purl.