Shown with a cast-on count of 27 stitches.  

• Rows 1, 3, 5, and 7 (RS): K1, k2tog, *k4, yo, k1, yo, k4, sl2-k1-p2sso, repeat from * to last 12 sts, k4, yo, k1, yo, k4, ssk, k1.
• Rows 2, 4, 6, 8, 10, 12, 14, 16, and 18: P27.
• Row 9: K27.
• Rows 11, 13, 15, and 17: K2, yo, k4, sl2-k1-p2sso, k4, *yo, k1, yo, k4, sl2-k1-p2sso, k4, repeat from * to last 2 sts, yo, k2.