Shown with a cast-on count of 37 stitches.  

• Row 1 (RS): K1, yo, k1, k2tog, k3, *k2, ssk, [k1, yo] twice, k1, k2tog, k3, repeat from * to last 6 sts, k2, ssk, k1, yo, k1.
• Rows 2, 6, 8, 10, 12, 16, 18, and 20: Purl.
• Row 3: K2tog, [yo] twice, k2tog, k3, *k2, ssk, [yo] twice, sl2-k1-p2sso, [yo] twice, k2tog, k3, repeat from * to last 6 sts, k2, ssk, [yo] twice, ssk.
• Row 4: P1, k1, p4, *p4, k1, p2, k1, p4, repeat from * to last 7 sts, p4, k1, p2.
• Row 5: [Yo, k1] twice, sl2-k1-p2sso, k2, *k1, sl2-k1-p2sso, k1, yo, (k1, yo, k1) in next st, yo, k1, sl2-k1-p2sso, k2, repeat from * to last 6 sts, k1, sl2-k1-p2sso, [k1, yo] twice.
• Row 7: [K1, yo, ssk] twice, k1, *[k2tog, yo, k1] twice, [yo, ssk, k1] twice, repeat from * to last 6 sts, [k2tog, yo, k1] twice.
• Row 9: Yo, [k1, yo, sl2-k1-p2sso] twice, *yo, k1, sl2-k1-p2sso, yo, (k1, yo, k1) in next st, yo, sl2-k1-p2sso, k1, yo, sl2-k1-p2sso, repeat from * to last 5 sts, yo, k1, sl2-k1-p2sso, yo, k1, yo.
• Row 11: K1, *k2, ssk, [k1, yo] twice, k1, k2tog, k3, repeat from * to last 12 sts, k2, ssk, [k1, yo] twice, k1, k2tog, k3.
• Row 13: K1, *k2, ssk, [yo] twice, sl2-k1-p2sso, [yo] twice, k2tog, k3, repeat from * to last 12 sts, k2, ssk, [yo] twice, sl2-k1-p2sso, [yo] twice, k2tog, k3.
• Row 14: P4, k1, p2, k1, p4, *p4, k1, p2, k1, p4, repeat from * to last st, p1.
• Row 15: K1, *k1, sl2-k1-p2sso, k1, yo, (k1, yo, k1) in next st, yo, k1, sl2-k1-p2sso, k2, repeat from * to last 12 sts, k1, sl2-k1-p2sso, k1, yo, (k1, yo, k1) in next st, yo, k1, sl2-k1-p2sso, k2.
• Row 17: K1, *[k2tog, yo, k1] twice, [yo, ssk, k1] twice, repeat from * to last 12 sts, k2tog, yo, k1, k2tog, yo, k1, yo, k2tog, k1, yo, ssk, k1.
• Row 19: K2tog, *yo, k1, sl2-k1-p2sso, yo, (k1, yo, k1) in next st, yo, sl2-k1-p2sso, k1, yo, sl2-k1-p2sso, repeat from * to last 11 sts, yo, k1, sl2-k1-p2sso, yo, (k1, yo, k1) in next st, yo, sl2-k1-p2sso, k1, yo, ssk.