Shown with a cast-on count of 7 stitches.  

• Row 1 (RS): K2, yo, k1, yo, k1, yo, k1, yo, k2 (11 sts).
• Rows 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, and 22: K2, purl to last 2 sts, k2.
• Row 3: K2, yo, k3, yo, k1, yo, k3, yo, k2 (15 sts).
• Row 5: K2, yo, k5, yo, k1, yo, k5, yo, k2 (19 sts).
• Row 7: K2, yo, k7, yo, k1, yo, k7, yo, k2 (23 sts).
• Row 9: K2, yo, k9, yo, k1, yo, k9, yo, k2 (27 sts).
• Row 11: K2, yo, k11, yo, k1, yo, k11, yo, k2 (31 sts).
• Row 13: K2, yo, k13, yo, k1, yo, k13, yo, k2 (35 sts).
• Row 15: K2, yo, k15, yo, k1, yo, k15, yo, k2 (39 sts).
• Row 17: K2, yo, k17, yo, k1, yo, k17, yo, k2 (43 sts).
• Row 19: K2, yo, k5, yo, k3, sl2-k1-p2sso, yo, k8, yo, k1, yo, k8, yo, sl2-k1-p2sso, k3, yo, k5, yo, k2 (47 sts).
• Row 21: K2, yo, k7, yo, k2, sl2-k1-p2sso, k5, yo, k4, yo, k1, yo, k4, yo, k5, sl2-k1-p2sso, k2, yo, k7, yo, k2 (51 sts).