Shown with a cast-on count of 1 stitch.  

• Row 1 (RS): (K1, yo, k1) in next st (3 sts).
• Row 2: Sl1 wyif, p1, k1.
• Row 3: Sl1 wyif, yo, k2 (4 sts).
• Row 4: Sl1 wyif, p2, k1.
• Row 5: Sl1 wyif, [yo, k1] twice, k1 (6 sts).
• Row 6: Sl1 wyif, p1, k1, p2, k1.
• Row 7: Sl1 wyif, [yo, k1] twice, yo, p1, yo, k2 (10 sts).
• Row 8: Sl1 wyif, p2tog, k2, p2tog, p2, k1 (8 sts).
• Row 9: Sl1 wyif, yo, k1, yo, k2tog, yo, p1, yo, k2tog, k1 (10 sts).
• Row 10: Sl1 wyif, p1, k3, p4, k1.
• Row 11: Sl1 wyif, [yo, k1] twice, yo, k2tog, [yo, p1] twice, yo, k2tog, k1 (14 sts).
• Row 12: Sl1 wyif, p2tog, k4, p2tog, p4, k1 (12 sts).
• Row 13: Sl1 wyif, [yo, k1] twice, yo, k1, k2tog, [yo, p1] twice, yo, p1, k2tog, k1 (16 sts).
• Row 14: Sl1 wyif, p2tog, k5, p2tog, p5, k1 (14 sts).
• Row 15: Sl1 wyif, [yo, k1] twice, yo, k2, k2tog, [yo, p1] twice, yo, p2, k2tog, k1 (18 sts).
• Row 16: Sl1 wyif, p2tog, k6, p2tog, p6, k1 (16 sts).
• Row 17: Sl1 wyif, [yo, k1] twice, yo, k3, k2tog, [yo, p1] twice, yo, p3, k2tog, k1 (20 sts).
• Row 18: Sl1 wyif, p2tog, k7, p2tog, p7, k1 (18 sts).
• Row 19: Sl1 wyif, [yo, k1] twice, yo, k4, k2tog, [yo, p1] twice, yo, p4, k2tog, k1 (22 sts).
• Row 20: Sl1 wyif, p2tog, k8, p2tog, p8, k1 (20 sts).
• Row 21: Sl1 wyif, [yo, k1] twice, yo, k5, k2tog, [yo, p1] twice, yo, p5, k2tog, k1 (24 sts).
• Row 22: Sl1 wyif, p2tog, k9, p2tog, p9, k1 (22 sts).
• Row 23: Sl1 wyif, [yo, k1] twice, yo, k6, k2tog, [yo, p1] twice, yo, p6, k2tog, k1 (26 sts).
• Row 24: Sl1 wyif, p2tog, k10, p2tog, p10, k1 (24 sts).