Shown with a cast-on count of 54 stitches.  

• Row 1 (RS): K1, yo, ssk, k4, ssk, *[yo] twice, k2tog, k4, ssk, yo, k2, yo, k2tog, k4, ssk, repeat from * to last 9 sts, [yo] twice, k2tog, k4, ssk, yo, k1.
• Rows 2 and 20: P8, k1, p1, *p16, k1, p1, repeat from * to last 8 sts, p8.
• Row 3: Yo, ssk, yo, sl1-k2tog-psso, [yo] twice, k3tog, yo, k1, *k1, yo, sl1-k2tog-psso, [yo] twice, k3tog, yo, k2tog, [yo] twice, ssk, yo, sl1-k2tog-psso, [yo] twice, k3tog, yo, k1, repeat from * to last 9 sts, k1, yo, sl1-k2tog-psso, [yo] twice, k3tog, yo, k2tog, yo.
• Row 4: P4, k1, p4, *p3, [k1, p4] 3 times, repeat from * to last 9 sts, p3, k1, p5.
• Row 5: K1, [yo] twice, sl1-k2tog-psso, k1, k2tog, yo, k2tog, *[yo] twice, ssk, yo, ssk, k1, k3tog, [yo] twice, k2, [yo] twice, sl1-k2tog-psso, k1, k2tog, yo, k2tog, repeat from * to last 9 sts, [yo] twice, ssk, yo, ssk, k1, k3tog, [yo] twice, k1.
• Row 6: P1, k1, p6, k1, p1, *p5, k1, p3, k1, p6, k1, p1, repeat from * to last 8 sts, p5, k1, p2.
• Row 7: Ssk, k1, [yo] twice, sl1-k2tog-psso, yo, k2tog, k1, *[yo] twice, k1, ssk, yo, k3tog, [yo] twice, k1, k2tog, ssk, k1, [yo] twice, sl1-k2tog-psso, yo, k2tog, k1, repeat from * to last 9 sts, [yo] twice, k1, ssk, yo, k3tog, [yo] twice, k1, k2tog.
• Row 8: P2, k1, p5, k1, p1, *p4, [k1, p5] twice, k1, p1, repeat from * to last 8 sts, p4, k1, p3.
• Row 9: Yo, ssk, k7, *k7, k2tog, [yo] twice, ssk, k7, repeat from * to last 9 sts, k7, k2tog, yo.
• Rows 10 and 12: P9, *p8, k1, p9, repeat from * to last 9 sts, p9.
• Row 11: Yo, k2tog, k4, ssk, yo, k1, *k1, yo, k2tog, k4, ssk, [yo] twice, k2tog, k4, ssk, yo, k1, repeat from * to last 9 sts, k1, yo, k2tog, k4, ssk, yo.
• Row 13: K1, yo, sl1-k2tog-psso, [yo] twice, k3tog, yo, k2tog, *[yo] twice, ssk, yo, sl1-k2tog-psso, [yo] twice, k3tog, yo, k2, yo, sl1-k2tog-psso, [yo] twice, k3tog, yo, k2tog, repeat from * to last 9 sts, [yo] twice, ssk, yo, sl1-k2tog-psso, [yo] twice, k3tog, yo, k1.
• Row 14: P3, k1, p4, k1, p1, *p3, k1, p7, k1, p4, k1, p1, repeat from * to last 8 sts, p3, k1, p4.
• Row 15: [Yo, ssk] twice, k1, k3tog, [yo] twice, k1, *k1, [yo] twice, sl1-k2tog-psso, k1, k2tog, yo, k2tog, [yo] twice, ssk, yo, ssk, k1, k3tog, [yo] twice, k1, repeat from * to last 9 sts, k1, [yo] twice, sl1-k2tog-psso, k1, [k2tog, yo] twice.
• Row 16: P6, k1, p2, *p1, [k1, p6] twice, k1, p2, repeat from * to last 9 sts, p1, k1, p7.
• Row 17: Yo, k1, ssk, yo, k3tog, [yo] twice, k1, k2tog, *ssk, k1, [yo] twice, sl1-k2tog-psso, yo, k2tog, k1, [yo] twice, k1, ssk, yo, k3tog, [yo] twice, k1, k2tog, repeat from * to last 9 sts, ssk, k1, [yo] twice, sl1-k2tog-psso, yo, k2tog, k1, yo.
• Row 18: P5, k1, p3, *p2, [k1, p5] twice, k1, p3, repeat from * to last 9 sts, p2, k1, p6.
• Row 19: K7, k2tog, *[yo] twice, ssk, k14, k2tog, repeat from * to last 9 sts, [yo] twice, ssk, k7.