Shown with a cast-on count of 5 stitches.  

• Row 1 (RS): P2, yo, k1, yo, p2 (7 sts).
• Row 2: P2, k3, p2.
• Row 3: P2, [yo, k1] 3 times, yo, p2 (11 sts).
• Row 4: P2, k1, yo, k5, yo, k1, p2 (13 sts).
• Row 5: P2, yo, k2, yo, k2, p1, k2, yo, k2, yo, p2 (17 sts).
• Row 6: P2, k1, yo, k11, yo, k1, p2 (19 sts).
• Row 7: P2, yo, [k3, yo] twice, k3, [yo, k3] twice, yo, p2 (25 sts).
• Row 8: P2, k1, yo, k5, yo, k9, yo, k5, yo, k1, p2 (29 sts).
• Row 9: P2, yo, [k3, yo] 3 times, k7, [yo, k3] 3 times, yo, p2 (37 sts).
• Row 10: P2, k1, yo, k10, yo, k1, yo, k9, yo, k1, yo, k10, yo, k1, p2 (43 sts).
• Row 11: P2, yo, knit to last 2 sts, yo, p2 (45 sts).
• Rows 12, 14, 16, 18, and 20: P2, knit to last 2 sts, p2.
• Row 13: P2, yo, knit to last 2 sts, yo, p2 (47 sts).
• Row 15: P2, yo, knit to last 2 sts, yo, p2 (49 sts).
• Row 17: P2, yo, knit to last 2 sts, yo, p2 (51 sts).
• Row 19: P2, yo, knit to last 2 sts, yo, p2 (53 sts).