Shown with a cast-on count of 9 stitches.  

• Row 1 (RS): K3, yo, [k1, yo] 3 times, k3 (13 sts).
• Row 2: K3, p7, k3.
• Row 3: K3, yo, k7, yo, k3 (15 sts).
• Row 4: K3, p9, k3.
• Row 5: K3, yo, k9, yo, k3 (17 sts).
• Row 6: K3, p4, p3, p4, k3.
• Row 7: K3, yo, k1, yo, k2, yo, k1, [k1, yo] twice, k1, k1, yo, k2, yo, k1, yo, k3 (25 sts).
• Rows 8, 10, 12, 14, 16, 18, and 20: K3, purl to last 3 sts, k3.
• Row 9: K3, yo, k1, yo, k6, k5, k6, yo, k1, yo, k3 (29 sts).
• Row 11: K3, yo, k1, yo, k7, yo, k1, k1, yo, k3, yo, k1, k1, yo, k7, yo, k1, yo, k3 (37 sts).
• Row 13: K3, yo, k1, yo, k11, k7, k11, yo, k1, yo, k3 (41 sts).
• Row 15: K3, yo, k1, yo, k12, yo, k1, k1, yo, k5, yo, k1, k1, yo, k12, yo, k1, yo, k3 (49 sts).
• Row 17: K3, yo, k1, yo, k16, k9, k16, yo, k1, yo, k3 (53 sts).
• Row 19: K3, yo, k1, yo, k17, yo, k1, k1, yo, k7, yo, k1, k1, yo, k17, yo, k1, yo, k3 (61 sts).