Shown with a cast-on count of 37 stitches.  

• Row 1 (RS): *P1, yo, sl1-k2tog-psso, k14, repeat from * to last st, p1 (multiple of 17 sts, plus 1).
• Rows 2, 4, 18, and 20: K1, *p16, k1, repeat from *.
• Row 3: *P1, yo, k1, yo, sl1-k2tog-psso, k12, repeat from * to last st, p1.
• Row 5: *P1, yo, k1, yo, k2, yo, sl1-k2tog-psso, k10, repeat from * to last st, p1 (multiple of 18 sts, plus 1).
• Rows 6, 16, 22, and 32: K1, *p17, k1, repeat from *.
• Row 7: *P1, yo, k1, yo, k2, yo, k3, yo, sl1-k2tog-psso, k8, repeat from * to last st, p1 (multiple of 20 sts, plus 1).
• Rows 8, 14, 24, and 30: K1, *p19, k1, repeat from *.
• Row 9: *P1, k1, yo, k2, yo, k3, yo, k4, sl1-k2tog-psso, k6, repeat from * to last st, p1 (multiple of 21 sts, plus 1).
• Rows 10, 12, 26, and 28: K1, *p20, k1, repeat from *.
• Row 11: *P1, k2, yo, k3, yo, k8, sl1-k2tog-psso, k4, repeat from * to last st, p1.
• Row 13: *P1, k3, yo, k12, sl1-k2tog-psso, k2, repeat from * to last st, p1 (multiple of 20 sts, plus 1).
• Row 15: *P1, k16, sl1-k2tog-psso, repeat from * to last st, p1 (multiple of 18 sts, plus 1).
• Row 17: *P1, k14, k3tog, yo, repeat from * to last st, p1 (multiple of 17 sts, plus 1).
• Row 19: *P1, k12, k3tog, yo, k1, yo, repeat from * to last st, p1.
• Row 21: *P1, k10, k3tog, yo, k2, yo, k1, yo, repeat from * to last st, p1 (multiple of 18 sts, plus 1).
• Row 23: *P1, k8, k3tog, yo, k3, yo, k2, yo, k1, yo, repeat from * to last st, p1 (multiple of 20 sts, plus 1).
• Row 25: *P1, k6, k3tog, k4, yo, k3, yo, k2, yo, k1, repeat from * to last st, p1 (multiple of 21 sts, plus 1).
• Row 27: *P1, k4, k3tog, k8, yo, k3, yo, k2, repeat from * to last st, p1.
• Row 29: *P1, k2, k3tog, k12, yo, k3, repeat from * to last st, p1 (multiple of 20 sts, plus 1).
• Row 31: *P1, k3tog, k16, repeat from * to last st, p1 (multiple of 18 sts, plus 1).