Shown with a cast-on count of 45 stitches.  

• Row 1 (RS): K20, k2tog, yo, k1, yo, ssk, k20.
• Rows 2, 4, 12, and 32: Knit.
• Row 3: K19, k2tog, yo, k3, yo, ssk, k19.
• Row 5: K18, k2tog, yo, k5, yo, ssk, k18.
• Row 7: K17, k2tog, yo, k1, yo, ssk, k1, k2tog, yo, k1, yo, ssk, k17.
• Rows 8 and 16: Knit.
• Row 9: K16, k2tog, yo, k3, yo, sl2-k1-p2sso, yo, k3, yo, ssk, k16.
• Row 11: K15, k2tog, yo, k11, yo, ssk, k15.
• Row 13: K14, k2tog, yo, k1, yo, ssk, k1, k2tog, yo, k1, yo, ssk, k1, k2tog, yo, k1, yo, ssk, k14.
• Row 15: K13, k2tog, yo, p1, k2, yo, sl2-k1-p2sso, yo, k3, yo, sl2-k1-p2sso, yo, k2, p1, yo, ssk, k13.