Shown with a cast-on count of 51 stitches.  

• Rows 1, 3, and 9 (RS): *K2tog tbl, k2tog, [yo, k1] 3 times, yo, k2tog tbl, k2tog, k9, repeat from * to last 11 sts, k2tog tbl, k2tog, [yo, k1] 3 times, yo, k2tog tbl, k2tog.
• Rows 2, 4, 6, 8, and 10: Purl.
• Rows 5 and 7: K10, *k2tog tbl, k2tog, [yo, k1] 3 times, yo, k2tog tbl, k2tog, k9, repeat from * to last st, k1.
• Row 11: *K2tog tbl, k2tog, [yo, k1] 3 times, yo, k2tog tbl, k2tog, k2tog, [k1, yo] 4 times, k1, k2tog tbl, repeat from * to last 11 sts, k2tog tbl, k2tog, [yo, k1] 3 times, yo, k2tog tbl, k2tog (multiple of 22 sts, plus 11).
• Row 13: Knit.
• Row 15: Knit.