Shown with a cast-on count of 14 stitches.  

• Rows 1, 11, and 23 (RS): K2tog, yo, k1, yo, k2tog, k9.
• Rows 2, 10, and 24: K2tog, yo, k3, yo, k2tog, k7.
• Rows 3 and 9: [K2tog, yo] twice, k1, [yo, k2tog] twice, k5.
• Rows 4 and 8: [K2tog, yo] twice, k3, [yo, k2tog] twice, k3.
• Rows 5 and 7: [K2tog, yo] 3 times, k1, [yo, k2tog] 3 times, k1.
• Row 6: K3, [yo, k2tog] twice, yo, sl1-k2tog-psso, yo, [k2tog, yo] twice.
• Rows 12 and 22: Yo, sl1-k2tog-psso, yo, k11.
• Rows 13 and 21: Yo, k2tog, k1, k2tog, yo, k9.
• Rows 14 and 20: Yo, k2tog, yo, sl1-k2tog-psso, yo, k2tog, yo, k7.
• Rows 15 and 19: [Yo, k2tog] twice, k1, [k2tog, yo] twice, k5.
• Rows 16 and 18: [Yo, k2tog] twice, yo, sl1-k2tog-psso, yo, [k2tog, yo] twice, k3.
• Row 17: [Yo, k2tog] 3 times, k1, [k2tog, yo] 3 times, k1.
• Row 25: K2tog, yo, k5, yo, k2tog, k5.
• Row 26: K2tog, yo, k7, yo, k2tog, k3.
• Row 27: K2tog, yo, k2, k2tog, yo, k1, yo, k2tog, k2, yo, k2tog, k1.
• Row 28: Yo, k2, k2tog, yo, k3, yo, k2tog, k2, yo, sl1-k2tog-psso.
• Row 29 (WS): Yo, k2tog, k2, yo, k2tog, yo, sl1-k2tog-psso, yo, k2, k2tog, yo, k1.
• Rows 30 and 36 (WS): Yo, k2tog, k2, yo, k2tog, k1, k2tog, yo, k2, k2tog, yo, k1.
• Row 31: Yo, k2tog, k3, yo, sl1-k2tog-psso, yo, k3, k2tog, yo, k1.
• Row 32: Yo, k2tog, k9, k2tog, yo, k1.
• Row 33: Yo, k2tog, k2, k2tog, yo, k1, yo, k2tog, k2, k2tog, yo, k1.
• Row 34: Yo, k2tog, k1, k2tog, yo, k3, yo, k2tog, k1, k2tog, yo, k1.
• Row 35: Yo, k2tog, k2, yo, k2tog, yo, sl1-k2tog-psso, yo, k2, k2tog, yo, k1.
• Row 37: Yo, k2tog, k2, yo, sl1-k2tog-psso, yo, k2, k2tog, yo, k3.
• Row 38: Yo, k2tog, k5, k2tog, yo, k5.
• Row 39: Yo, k2tog, k3, k2tog, yo, k7.
• Row 40: Yo, k2tog, k1, k2tog, yo, k9.
• Row 41: Yo, sl1-k2tog-psso, yo, k11.