Shown with a cast-on count of 23 stitches.  

• Row 1 (RS): *K1, p1, k1, yo, ssk, p2, k2tog, yo, k1, p1, repeat from * to last st, k1.
• Row 2: P1, *[k1, p1] twice, k2, [p1, k1] twice, p1, repeat from *.
• Row 3: *K1, p1, yo, k1, p1, ssk, k2tog, p1, k1, yo, p1, repeat from * to last st, k1.
• Rows 4 and 6: P1, *k2, p1, k1, p2, k1, p1, k2, p1, repeat from *.
• Row 5: *K1, p2, k1, yo, ssk, k2tog, yo, k1, p2, repeat from * to last st, k1.
• Row 7: *K1, ssk, yo, k1, p1, k2, p1, k1, yo, k2tog, repeat from * to last st, k1.
• Rows 8, 10, and 16: P1, *[p1, k1] twice, p2, [k1, p1] twice, p1, repeat from *.
• Row 9: *K2, p1, ssk, yo, k2, yo, k2tog, p1, k1, repeat from * to last st, k1.
• Row 11: *K2, ssk, p1, yo, k2, yo, p1, k2tog, k1, repeat from * to last st, k1.
• Row 12: P1, *[p2, k2] twice, p3, repeat from *.
• Row 13: *K1, ssk, yo, p2, k2, p2, yo, k2tog, repeat from * to last st, k1.
• Row 14: P1, *p1, k3, p2, k3, p2, repeat from *.
• Row 15: *[K2, yo, sl2-k1-p2sso, yo] twice, k1, repeat from * to last st, k1.