Shown with a cast-on count of 41 stitches.  

• Row 1 (RS): P1, *k6, k2tog, yo, k1, p1, k1, yo, ssk, k6, p1, repeat from *.
• Rows 2, 6, 10, 12, 16, and 20: *[K1, p9] twice, repeat from * to last st, k1.
• Row 3: P1, *k3, k2tog, [yo] twice, k2tog, k2, p1, k2, ssk, [yo] twice, ssk, k3, p1, repeat from *.
• Row 4: *[K1, p4] twice, k1, p3, k1, p5, repeat from * to last st, k1.
• Row 5: P1, *k2, k2tog, yo, k2, yo, sl2-k1-p2sso, yo, p1, yo, sl2-k1-p2sso, yo, k2, yo, ssk, k2, p1, repeat from *.
• Row 7: P1, *yo, k3tog, k4, [yo] twice, ssk, p1, k2tog, [yo] twice, k4, sl1-k2tog-psso, yo, p1, repeat from *.
• Row 8: *K1, p6, k1, p2, k1, p1, k1, p7, repeat from * to last st, k1.
• Row 9: P1, *k1, ssk, k4, yo, k2, p1, k2, yo, k4, k2tog, k1, p1, repeat from *.
• Row 11: P1, *k1, yo, ssk, k6, p1, k6, k2tog, yo, k1, p1, repeat from *.
• Row 13: P1, *k2, ssk, [yo] twice, ssk, k3, p1, k3, k2tog, [yo] twice, k2tog, k2, p1, repeat from *.
• Row 14: *K1, p3, k1, p5, [k1, p4] twice, repeat from * to last st, k1.
• Row 15: P1, *yo, sl2-k1-p2sso, yo, k2, yo, ssk, k2, p1, k2, k2tog, yo, k2, yo, sl2-k1-p2sso, yo, p1, repeat from *.
• Row 17: P1, *k2tog, [yo] twice, k4, sl1-k2tog-psso, yo, p1, yo, k3tog, k4, [yo] twice, ssk, p1, repeat from *.
• Row 18: *K1, p1, k1, p7, k1, p6, k1, p2, repeat from * to last st, k1.
• Row 19: P1, *k2, yo, k4, k2tog, k1, p1, k1, ssk, k4, yo, k2, p1, repeat from *.