Shown with a cast-on count of 33 stitches.  

• Row 1 (RS): Yo, k1, *k1, [k2tog, yo] 3 times, k1, [yo, ssk] 3 times, k2, repeat from *, yo (multiple of 16 sts, plus 3).
• Row 3: Yo, k2, *[k2tog, yo] 3 times, k3, [yo, ssk] 3 times, k1, repeat from * to last st, k1, yo (multiple of 16 sts, plus 5).
• Row 5: Yo, k1, yo, sl1-k2tog-psso, *yo, [k2tog, yo] twice, k5, [yo, ssk] twice, yo, sl1-k2tog-psso, repeat from * to last st, yo, k1, yo (multiple of 16 sts, plus 7).
• Row 7: Yo, k4, *[k2tog, yo] twice, k7, [yo, ssk] twice, k1, repeat from * to last 3 sts, k3, yo (multiple of 16 sts, plus 9).
• Row 9: Yo, k1, yo, ssk, yo, sl1-k2tog-psso, *yo, k2tog, yo, k1, yo, k2, sl1-k2tog-psso, k2, yo, k1, yo, ssk, yo, sl1-k2tog-psso, repeat from * to last 3 sts, yo, k2tog, yo, k1, yo (multiple of 16 sts, plus 11).
• Row 11: Yo, k6, *k2tog, yo, k3, yo, k1, sl1-k2tog-psso, k1, yo, k3, yo, ssk, k1, repeat from * to last 5 sts, k5, yo (multiple of 16 sts, plus 13).
• Row 13: *Yo, k5, yo, sl1-k2tog-psso, repeat from * to last 5 sts, yo, k5, yo (multiple of 8 sts, plus 7).
• Row 15: Yo, k8, *k1, yo, k1, sl1-k2tog-psso, k1, yo, k3, yo, k1, sl1-k2tog-psso, k1, yo, k2, repeat from * to last 7 sts, k7, yo (multiple of 16 sts, plus 17).
• Row 17: Yo, k2, yo, k4, k2tog, yo, k1, *yo, ssk, yo, sl1-k2tog-psso, yo, k5, yo, sl1-k2tog-psso, yo, k2tog, yo, k1, repeat from * to last 8 sts, yo, ssk, k4, yo, k2, yo (multiple of 16 sts, plus 21).
• Row 19: Yo, [k1, yo] twice, ssk, k3, k2tog, yo, k2, *k1, [yo, ssk] twice, yo, k1, sl1-k2tog-psso, k1, yo, [k2tog, yo] twice, k2, repeat from * to last 10 sts, k1, yo, ssk, k3, k2tog, [yo, k1] twice, yo (multiple of 16 sts, plus 25).