Shown with a cast-on count of 4 stitches.  

• Row 1 (RS): K4.
• Row 2: K4.
• Row 3: K1, kfb, k1, [yo] twice, k1 (7 sts).
• Rows 4, 6, 8, 10, 12, 14, 16, and 18: Knit to last 4 sts, p1, k3.
• Row 5: K1, kfb, k2tog, [yo] twice, k2tog, knit (8 sts).
• Row 7: K1, kfb, k2tog, [yo] twice, k2tog, knit (9 sts).
• Row 9: K1, kfb, k2tog, [yo] twice, k2tog, knit (10 sts).
• Row 11: K1, kfb, k2tog, [yo] twice, k2tog, knit (11 sts).
• Row 13: K1, kfb, k2tog, [yo] twice, k2tog, knit (12 sts).
• Row 15: K1, kfb, k2tog, [yo] twice, k2tog, knit (13 sts).
• Row 17: K1, kfb, k2tog, [yo] twice, k2tog, knit (14 sts).
• Row 19: K1, kfb, k2tog, [yo] twice, k2tog, k1, yo, k2tog, yo, k2tog, CO 4 sts, k2tog, k1 (18 sts).
• Row 20: Knit to last 5 sts, p1, k4.
• Row 21: K2, kfb, k2tog, [yo] twice, k2tog, k5, [(k1, p1) in next st] 4 times, k2 (23 sts).
• Row 22: Knit to last 6 sts, p1, k5.
• Row 23: K3, kfb, k2tog, [yo] twice, k2tog, k1, [yo, k2tog] 6 times, yo, k2 (25 sts).
• Row 24: Knit to last 7 sts, p1, k6.
• Row 25: K4, kfb, k2tog, [yo] twice, k2tog, k16 (26 sts).
• Row 26: BO 8 sts, knit to last 8 sts, p1, k7 (18 sts).
• Row 27: K5, kfb, k2tog, [yo] twice, k2tog, k1, yo, k2tog, yo, k2tog, CO 4 sts, k2tog, k1 (22 sts).
• Row 28: Knit to last 9 sts, p1, k8.
• Row 29: K6, kfb, k2tog, [yo] twice, k2tog, k5, [(k1, p1) in next st] 4 times, k2 (27 sts).
• Row 30: Knit to last 10 sts, p1, k9.
• Row 31: K7, kfb, k2tog, [yo] twice, k2tog, k1, [yo, k2tog] 6 times, yo, k2 (29 sts).
• Row 32: Knit to last 11 sts, p1, k10.
• Row 33: K8, kfb, k2tog, [yo] twice, k2tog, k16 (30 sts).
• Row 34: BO 8 sts, knit to last 12 sts, p1, k11 (22 sts).