Shown with a cast-on count of 5 stitches.  

• Row 1 (RS): K2, yo, k1 tbl, yo, k2 (7 sts).
• Rows 2, 4, 6, 8, 10, 12, 14, and 16: Purl.
• Row 3: K2, yo, kfb, k1, kfb, yo, k2 (11 sts).
• Row 5: K2, k1 tbl, yo, k5, yo, k1 tbl, k2 (13 sts).
• Row 7: K2, yo, k1 tbl, yo, ssk, k3, k2tog, yo, k1 tbl, yo, k2 (15 sts).
• Row 9: K2, yo, kfb, k1, kfb, yo, k5tog, yo, kfb, k1, kfb, yo, k2 (19 sts).
• Row 11: K3, yo, k4, k2tog, yo, k1 tbl, yo, ssk, k4, yo, k3 (21 sts).
• Row 13: K2, yo, k1 tbl, yo, ssk, k3, k2tog, yo, k1 tbl, yo, ssk, k3, k2tog, yo, k1 tbl, yo, k2 (23 sts).
• Row 15: K2, yo, kfb, k1, kfb, yo, k5tog, yo, kfb, k1, kfb, yo, k5tog, yo, kfb, k1, kfb, yo, k2 (27 sts).
• Row 17: K3, yo, k4, k2tog, yo, k1 tbl, yo, ssk, k3, k2tog, yo, k1 tbl, yo, ssk, k4, yo, k3 (29 sts).