Shown with a cast-on count of 31 stitches.  

• Row 1 (RS): K1, *yo, ssk, k2, PBsl, k2, k2tog, yo, k1, repeat from *.
• Rows 2, 4, 6, 8, 10, 12, 14, and 16: Purl.
• Row 3: K1, *k1, yo, ssk, k3, k2tog, yo, k2, repeat from *.
• Row 5: K1, *k2, yo, ssk, k1, k2tog, yo, k3, repeat from *.
• Row 7: K1, *k3, yo, sl2-k1-p2sso, yo, k4, repeat from *.
• Row 9: PBsl, *k2, k2tog, yo, k1, yo, ssk, k2, PBsl, repeat from *.
• Row 11: K1, *k1, k2tog, yo, k3, yo, ssk, k2, repeat from *.
• Row 13: K1, *k2tog, yo, k5, yo, ssk, k1, repeat from *.
• Row 15: K2tog, *yo, k7, yo, sl2-k1-p2sso, repeat from * to last 9 sts, yo, k7, yo, ssk.