Shown with a cast-on count of 2 stitches.  

• Rows 1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, and 31 (WS): Knit.
• Row 2: Kfb, k1 (3 sts).
• Row 4: K1, kfb, k1 (4 sts).
• Row 6: K2, yo, k2 (5 sts).
• Row 8: Knit.
• Row 10: K2, yo, k1, yo, k2 (7 sts).
• Row 12: K2, yo, sl1-k2tog-psso, yo, k2.
• Row 14: K2, yo, k3, yo, k2 (9 sts).
• Row 16: K2, yo, k1, sl1-k2tog-psso, k1, yo, k2.
• Row 18: K2, yo, k1, yo, sl1-k2tog-psso, yo, k1, yo, k2 (11 sts).
• Row 20: K1, kfb, k2, sl1-k2tog-psso, k1, kfb, k2.
• Row 22: K2, [yo, k1] twice, sl1-k2tog-psso, [k1, yo] twice, k2 (13 sts).
• Row 24: K1, kfb, k3, sl1-k2tog-psso, k2, kfb, k2.
• Row 26: K2, yo, k1, yo, k2tog, yo, sl1-k2tog-psso, yo, k2tog, yo, k1, yo, k2 (15 sts).
• Row 28: K1, kfb, k4, sl1-k2tog-psso, k3, kfb, k2.
• Row 29: K1, kfb, k10, kfb, k2 (17 sts).
• Row 30: K2, yo, k1, [yo, k2tog] twice, yo, sl1-k2tog-psso, [yo, k2tog] twice, yo, k1, yo, k2 (19 sts).
• Row 32: K1, kfb, k6, sl1-k2tog-psso, k5, kfb, k2.
• Row 33: K1, kfb, k14, kfb, k2 (21 sts).
• Row 34: K1, kfb, k7, sl1-k2tog-psso, k6, kfb, k2.
• Row 35: K1, kfb, k16, kfb, k2 (23 sts).
• Row 36: K1, kfb, k8, sl1-k2tog-psso, k7, kfb, k2.
• Row 37: K1, kfb, k18, kfb, k2 (25 sts).