Shown with a cast-on count of 41 stitches.  

• Row 13 (RS): K1, (k1, yo, k1) in next st, k2, 1/1 RC, k1, 1/1 RC, k1, 1/1 RC, k1, k2tog, yo, k1, k2tog, yo, k5, yo, ssk, k1, yo, ssk, k1, 1/1 LC, k1, 1/1 LC, k1, 1/1 LC, k2, (k1, yo, k1) in next st, k1 (45 sts).
• Row 14: Sl1 wyib, yo, purl to last st, yo, sl1 wyib (47 sts).
• Row 15: K1, (k1, yo, k1) in next st, 1/1 RC, k1, 1/1 RC, k1, 1/1 RC, k1, 1/1 RC, k1, k2tog, yo, k1, k2tog, yo, k1, k2tog, yo, 3-to-3 gather, yo, ssk, k1, yo, ssk, k1, yo, ssk, k1, 1/1 LC, k1, 1/1 LC, k1, 1/1 LC, k1, 1/1 LC, (k1, yo, k1) in next st, k1 (51 sts).
• Row 16: Sl1 wyib, yo, purl to last st, yo, sl1 wyib (53 sts).
• Row 17: K1, (k1, yo, k1) in next st, k2, 1/1 RC, k1, 1/1 RC, k1, 1/1 RC, k1, 1/1 RC, k1, k2tog, yo, k1, k2tog, yo, k1, k2tog, yo, k5, yo, ssk, k1, yo, ssk, k1, yo, ssk, k1, 1/1 LC, k1, 1/1 LC, k1, 1/1 LC, k1, 1/1 LC, k2, (k1, yo, k1) in next st, k1 (57 sts).
• Row 18: Sl1 wyib, yo, purl to last st, yo, sl1 wyib (59 sts).
• Row 19: K1, (k1, yo, k1) in next st, k1, 1/1 RC, k1, 1/1 RC, k1, 1/1 RC, k1, 1/1 RC, k1, 1/1 RC, k1, k2tog, yo, k1, k2tog, yo, k13, yo, ssk, k1, yo, ssk, k1, 1/1 LC, k1, 1/1 LC, k1, 1/1 LC, k1, 1/1 LC, k1, 1/1 LC, k1, (k1, yo, k1) in next st, k1 (63 sts).
• Row 20: Sl1 wyib, yo, purl to last st, yo, sl1 wyib (65 sts).
• Row 21: K1, (k1, yo, k1) in next st, 1/1 RC, k1, 1/1 RC, k1, 1/1 RC, k1, 1/1 RC, k1, 1/1 RC, k1, 1/1 RC, k1, k2tog, yo, k21, yo, ssk, k1, 1/1 LC, k1, 1/1 LC, k1, 1/1 LC, k1, 1/1 LC, k1, 1/1 LC, k1, 1/1 LC, (k1, yo, k1) in next st, k1 (69 sts).
• Row 22: Sl1 wyib, yo, purl to last st, yo, sl1 wyib (71 sts).
• Row 23: K1, (k1, yo, k1) in next st, k2, 1/1 RC, k1, 1/1 RC, k1, 1/1 RC, k1, 1/1 RC, k1, 1/1 RC, k1, 1/1 RC, k29, 1/1 LC, k1, 1/1 LC, k1, 1/1 LC, k1, 1/1 LC, k1, 1/1 LC, k1, 1/1 LC, k2, (k1, yo, k1) in next st, k1 (75 sts).
• Row 24: Sl1 wyib, yo, purl to last st, yo, sl1 wyib (77 sts).
• Row 25: K1, (k1, yo, k1) in next st, k1, 1/1 RC, k1, 1/1 RC, k1, 1/1 RC, k1, 1/1 RC, k1, 1/1 RC, k1, 1/1 RC, knit to last 20 sts, 1/1 LC, k1, 1/1 LC, k1, 1/1 LC, k1, 1/1 LC, k1, 1/1 LC, k1, 1/1 LC, k1, (k1, yo, k1) in next st, k1 (81 sts).
• Row 26: Sl1 wyib, yo, purl to last st, yo, sl1 wyib (83 sts).
• Row 27: K1, (k1, yo, k1) in next st, 1/1 RC, k1, 1/1 RC, k1, 1/1 RC, k1, 1/1 RC, k1, 1/1 RC, k1, 1/1 RC, knit to last 19 sts, 1/1 LC, k1, 1/1 LC, k1, 1/1 LC, k1, 1/1 LC, k1, 1/1 LC, k1, 1/1 LC, (k1, yo, k1) in next st, k1 (87 sts).
• Row 28: Sl1 wyib, yo, purl to last st, yo, sl1 wyib (89 sts).
• Row 29: K1, (k1, yo, k1) in next st, k1, 1/1 RC, k1, 1/1 RC, k1, 1/1 RC, k1, 1/1 RC, k1, 1/1 RC, k1, 1/1 RC, knit to last 20 sts, 1/1 LC, k1, 1/1 LC, k1, 1/1 LC, k1, 1/1 LC, k1, 1/1 LC, k1, 1/1 LC, k1, (k1, yo, k1) in next st, k1 (93 sts).
• Row 30: Sl1 wyib, yo, purl to last st, yo, sl1 wyib (95 sts).
• Row 31: K1, (k1, yo, k1) in next st, 1/1 RC, k1, 1/1 RC, k1, 1/1 RC, k1, 1/1 RC, k1, 1/1 RC, k1, 1/1 RC, knit to last 19 sts, 1/1 LC, k1, 1/1 LC, k1, 1/1 LC, k1, 1/1 LC, k1, 1/1 LC, k1, 1/1 LC, (k1, yo, k1) in next st, k1 (99 sts).
• Row 32: Sl1 wyib, yo, purl to last st, yo, sl1 wyib (101 sts).
• Row 33: K1, (k1, yo, k1) in next st, k1, 1/1 RC, k1, 1/1 RC, k1, 1/1 RC, k1, 1/1 RC, k1, 1/1 RC, k1, 1/1 RC, knit to last 20 sts, 1/1 LC, k1, 1/1 LC, k1, 1/1 LC, k1, 1/1 LC, k1, 1/1 LC, k1, 1/1 LC, k1, (k1, yo, k1) in next st, k1 (105 sts).
• Row 34: Sl1 wyib, yo, purl to last st, yo, sl1 wyib (107 sts).
• Row 35: K1, (k1, yo, k1) in next st, 1/1 RC, k1, 1/1 RC, k1, 1/1 RC, k1, 1/1 RC, k1, 1/1 RC, k1, 1/1 RC, knit to last 19 sts, 1/1 LC, k1, 1/1 LC, k1, 1/1 LC, k1, 1/1 LC, k1, 1/1 LC, k1, 1/1 LC, (k1, yo, k1) in next st, k1 (111 sts).
• Row 36: Sl1 wyib, yo, purl to last st, yo, sl1 wyib (113 sts).
• Row 37: K1, (k1, yo, k1) in next st, k1, 1/1 RC, k1, 1/1 RC, k1, 1/1 RC, k1, 1/1 RC, k1, 1/1 RC, k1, 1/1 RC, knit to last 20 sts, 1/1 LC, k1, 1/1 LC, k1, 1/1 LC, k1, 1/1 LC, k1, 1/1 LC, k1, 1/1 LC, k1, (k1, yo, k1) in next st, k1 (117 sts).
• Row 38: Sl1 wyib, yo, purl to last st, yo, sl1 wyib (119 sts).
• Row 39: K1, (k1, yo, k1) in next st, 1/1 RC, k1, 1/1 RC, k1, 1/1 RC, k1, 1/1 RC, k1, 1/1 RC, k1, 1/1 RC, knit to last 19 sts, 1/1 LC, k1, 1/1 LC, k1, 1/1 LC, k1, 1/1 LC, k1, 1/1 LC, k1, 1/1 LC, (k1, yo, k1) in next st, k1 (123 sts).
• Row 40: Sl1 wyib, yo, purl to last st, yo, sl1 wyib (125 sts).