Shown with a cast-on count of 41 stitches.  

• Row 1 (RS): K1, *k6, k2tog, [yo, k1] 3 times, yo, ssk, k7, repeat from * (multiple of 22 sts, plus 1).
• Row 2: *P6, ssp, p7, p2tog, p5, repeat from * to last st, p1 (multiple of 20 sts, plus 1).
• Row 3: K1, *k4, k2tog, k2, [yo, k1] 3 times, yo, k2, ssk, k5, repeat from * (multiple of 22 sts, plus 1).
• Row 4: *P4, ssp, p11, p2tog, p3, repeat from * to last st, p1 (multiple of 20 sts, plus 1).
• Row 5: K1, *k2, k2tog, k4, [yo, k1] 3 times, yo, k4, ssk, k3, repeat from * (multiple of 22 sts, plus 1).
• Row 6: *P2, ssp, p15, p2tog, p1, repeat from * to last st, p1 (multiple of 20 sts, plus 1).
• Row 7: K1, *yo, k1, yo, ssk, k13, k2tog, [yo, k1] twice, repeat from * (multiple of 22 sts, plus 1).
• Row 8: *P4, p2tog, p11, ssp, p3, repeat from * to last st, p1 (multiple of 20 sts, plus 1).
• Row 9: K1, *yo, k1, yo, k2, ssk, k9, k2tog, k2, [yo, k1] twice, repeat from * (multiple of 22 sts, plus 1).
• Row 10: *P6, p2tog, p7, ssp, p5, repeat from * to last st, p1 (multiple of 20 sts, plus 1).
• Row 11: K1, *yo, k1, yo, k4, ssk, k5, k2tog, k4, [yo, k1] twice, repeat from * (multiple of 22 sts, plus 1).
• Row 12: *P8, p2tog, p3, ssp, p7, repeat from * to last st, p1 (multiple of 20 sts, plus 1).