Shown with a cast-on count of 41 stitches.  

• Row 1 (RS): K1, *k3, yo, 7-to-5 gather, yo, k2, [k2tog, yo] 3 times, repeat from * to last 4 sts, k4.
• Rows 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, and 28: Purl.
• Row 3: K1, *k1, k2tog, yo, k3, yo, ssk, k2, yo, ssk, k1, [k2tog, yo] twice, k1, repeat from * to last 4 sts, k1, k2tog, yo, k1.
• Row 5: K1, *k2tog, yo, k2, k2tog, yo, k1, yo, ssk, k2, yo, ssk, k1, k2tog, yo, k2, repeat from * to last 4 sts, k2tog, yo, k2.
• Row 7: K1, *k2, yo, sl1-k2tog-psso, yo, k3, yo, sl1-k2tog-psso, yo, k7, repeat from * to last 4 sts, k2, yo, ssk.
• Row 9: K1, *k2tog, yo, k9, [yo, ssk] twice, k1, k2tog, yo, repeat from * to last 4 sts, k2tog, yo, k2.
• Row 11: K1, *k2, yo, ssk, k1, k2tog, yo, k2, k2tog, yo, k3, yo, sl1-k2tog-psso, yo, k1, repeat from * to last 4 sts, k2, yo, ssk.
• Row 13: K1, *k2tog, yo, k2, [k2tog, yo] twice, k3, yo, ssk, k2, yo, ssk, k1, repeat from * to last 4 sts, ssk, yo, k2.
• Row 15: K2tog, *yo, k2, [k2tog, yo] 3 times, k3, yo, 7-to-5 gather, repeat from * to last 3 sts, yo, k3.
• Row 17: K1, *k1, yo, ssk, k1, [k2tog, yo] twice, k2, k2tog, yo, k3, yo, ssk, k1, repeat from * to last 4 sts, k1, yo, ssk, k1.
• Row 19: K1, *k2, yo, ssk, k1, k2tog, yo, k2, k2tog, yo, k2, k2tog, yo, k1, yo, ssk, repeat from * to last 4 sts, k2, yo, ssk.
• Row 21: Yo, *sl1-k2tog-psso, yo, k9, yo, sl1-k2tog-psso, yo, k3, yo, repeat from * to last 5 sts, sl1-k2tog-psso, yo, k2.
• Row 23: K1, *k2, [yo, ssk] twice, k1, [k2tog, yo] twice, k7, repeat from * to last 4 sts, k2, yo, ssk.
• Row 25: K1, *k2tog, yo, k3, yo, sl1-k2tog-psso, yo, k3, yo, ssk, k1, k2tog, yo, k2, repeat from * to last 4 sts, k2tog, yo, k2.
• Row 27: K1, *k2, yo, ssk, k2, yo, ssk, k1, k2tog, yo, k2, [k2tog, yo] twice, k1, repeat from * to last 4 sts, k2, yo, ssk.