Shown with a cast-on count of 2 stitches.  

• Row 1 (RS): Yo, kfb, yo, k1 (5 sts).
• Rows 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46, 48, and 50: Purl.
• Row 3: Yo, k4, yo, k1 (7 sts).
• Row 5: Yo, k6, yo, k1 (9 sts).
• Row 7: Yo, k8, yo, k1 (11 sts).
• Row 9: Yo, k10, yo, k1 (13 sts).
• Row 11: Yo, k12, yo, k1 (15 sts).
• Row 13: Yo, k1, yo, ssk, k8, k2tog, yo, k1, yo, k1 (17 sts).
• Row 15: Yo, k3, yo, ssk, k6, k2tog, yo, k3, yo, k1 (19 sts).
• Row 17: Yo, k1, yo, sl1-k2tog-psso, yo, k1, yo, ssk, k4, k2tog, yo, k1, yo, sl1-k2tog-psso, yo, k1, yo, k1 (21 sts).
• Row 19: Yo, k3, yo, k2tog, k2, yo, ssk, k2, k2tog, yo, k2, ssk, yo, k3, yo, k1 (23 sts).
• Row 21: Yo, k1, yo, sl1-k2tog-psso, yo, k1, yo, sl1-k2tog-psso, yo, k1, yo, ssk, k2tog, yo, k1, yo, sl1-k2tog-psso, yo, k1, yo, sl1-k2tog-psso, yo, k1, yo, k1 (25 sts).
• Row 23: Yo, k3, yo, k2tog, k2, yo, k2tog, k6, ssk, yo, k2, ssk, yo, k3, yo, k1 (27 sts).
• Row 25: Yo, k1, yo, ssk, k2, [yo, sl1-k2tog-psso, yo, k1] twice, [k1, yo, sl1-k2tog-psso, yo] twice, k2, k2tog, yo, k1, yo, k1 (29 sts).
• Row 27: Yo, k3, yo, ssk, k2, yo, k2tog, k2, yo, k2tog, k2, ssk, yo, k2, ssk, yo, k2, k2tog, yo, k3, yo, k1 (31 sts).
• Row 29: Yo, k1, yo, sl1-k2tog-psso, yo, k1, yo, ssk, k2, yo, sl1-k2tog-psso, yo, k6, yo, sl1-k2tog-psso, yo, k2, k2tog, yo, k1, yo, sl1-k2tog-psso, yo, k1, yo, k1 (33 sts).
• Row 31: Yo, k3, yo, k2tog, k2, yo, ssk, k2, yo, k2tog, k6, ssk, yo, k2, k2tog, yo, k2, ssk, yo, k3, yo, k1 (35 sts).
• Row 33: Yo, k1, [yo, sl1-k2tog-psso, yo, k1] twice, yo, ssk, k2, yo, sl1-k2tog-psso, yo, k2, yo, sl1-k2tog-psso, yo, k2, k2tog, yo, [k1, yo, sl1-k2tog-psso, yo] twice, k1, yo, k1 (37 sts).
• Row 35: Yo, k3, [yo, k2tog, k2] twice, yo, ssk, k2, yo, k2tog, k2, ssk, yo, k2, k2tog, yo, [k2, k2tog, yo] twice, k3, yo, k1 (39 sts).
• Row 37: Yo, k1, [yo, sl1-k2tog-psso, yo, k1] 3 times, yo, ssk, k8, k2tog, yo, [k1, yo, sl1-k2tog-psso, yo] 3 times, k1, yo, k1 (41 sts).
• Row 39: Yo, k3, [yo, k2tog, k2] 3 times, yo, ssk, k6, k2tog, yo, [k2, ssk, yo] 3 times, k3, yo, k1 (43 sts).
• Row 41: Yo, k5, [yo, sl1-k2tog-psso, yo, k1] 3 times, yo, ssk, k4, k2tog, yo, [k1, yo, sl1-k2tog-psso, yo] 3 times, k5, yo, k1 (45 sts).
• Row 43: Yo, k7, [yo, k2tog, k2] 3 times, yo, ssk, k2, k2tog, yo, [k2, ssk, yo] 3 times, k7, yo, k1 (47 sts).
• Row 45: Yo, k1, yo, ssk, k6, [yo, sl1-k2tog-psso, yo, k1] 3 times, yo, ssk, k2tog, yo, [k1, yo, sl1-k2tog-psso, yo] 3 times, k6, k2tog, yo, k1, yo, k1 (49 sts).
• Row 47: Yo, k3, yo, ssk, k6, [yo, k2tog, k2] 3 times, k2, [k2, ssk, yo] 3 times, k6, k2tog, yo, k3, yo, k1 (51 sts).
• Row 49: Yo, k5, yo, ssk, k6, [yo, sl1-k2tog-psso, yo, k1] 3 times, [k1, yo, sl1-k2tog-psso, yo] 3 times, k6, k2tog, yo, k5, yo, k1 (53 sts).
• Row 51: Yo, k7, yo, ssk, k6, [yo, k2tog, k2] twice, yo, k2tog, k2, ssk, yo, [k2, ssk, yo] twice, k6, k2tog, yo, k7, yo, k1 (55 sts).