Shown with a cast-on count of 30 stitches.  

• Row 1 (RS): Sl1 wyib, k1, *k1, [yo] twice, k13, repeat from * (multiple of 16 sts, plus 2).
• Row 2: *Yo, k2tog, k12, p1, k1, repeat from * to last 2 sts, k2.
• Rows 3, 7, 11, and 15: Sl1 wyib, knit.
• Row 4: *Yo, k2tog, k14, repeat from * to last 2 sts, k2.
• Row 5: Sl1 wyib, k1, *k1, [yo] twice, k2tog, [yo] twice, k13, repeat from * (multiple of 19 sts, plus 2).
• Row 6: *Yo, k2tog, k12, p1, k2, p1, k1, repeat from * to last 2 sts, k2.
• Row 8: *Yo, k2tog, k17, repeat from * to last 2 sts, k2.
• Row 9: Sl1 wyib, k1, *k1, [[yo] twice, k2tog] 3 times, k12, repeat from * (multiple of 22 sts, plus 2).
• Row 10: *Yo, k2tog, k12, [p1, k2] twice, p1, k1, repeat from * to last 2 sts, k2.
• Row 12: *Yo, k2tog, k20, repeat from * to last 2 sts, k2.
• Row 13: Sl1 wyib, k1, *k1, [[yo] twice, k2tog] 4 times, k13, repeat from * (multiple of 26 sts, plus 2).
• Row 14: *Yo, k2tog, k13, [p1, k2] 3 times, p1, k1, repeat from * to last 2 sts, k2.
• Row 16: *Yo, k2tog, k24, repeat from * to last 2 sts, k2.
• Row 17: Sl1 wyib, k1, *k12, k8tog, k6tog, repeat from * (multiple of 14 sts, plus 2).
• Row 18: *Yo, k2tog, k12, repeat from * to last 2 sts, k2.
• Repeat rows 1-18.