Shown with a cast-on count of 37 stitches.  

• Rows 1 and 11 (RS): P1, *k17, p1, repeat from *.
• Rows 2 and 10: K1, *p17, k1, repeat from *.
• Row 3: P1, *k2tog, k6, yo, k1, yo, k6, ssk, p1, repeat from *.
• Rows 4 and 6: K1, *ssp, p13, p2tog, k1, repeat from * (multiple of 16 sts, plus 1).
• Row 5: P1, *k2tog, k4, [yo, k1] 3 times, yo, k4, ssk, p1, repeat from * (multiple of 18 sts, plus 1).
• Row 7: P1, *k2tog, k2, [yo, k1] 7 times, yo, k2, ssk, p1, repeat from * (multiple of 22 sts, plus 1).
• Row 8: K1, *ssp, p17, p2tog, k1, repeat from * (multiple of 20 sts, plus 1).
• Row 9: P1, *k2tog, k15, ssk, p1, repeat from * (multiple of 18 sts, plus 1).
• Rows 12 and 14: Knit.
• Row 13: P1, *yo, k2tog, repeat from *.