Shown with a cast-on count of 0 stitches.  

• Row 0 (WS): CO 9 sts (9 sts).
• Row 1: K2, yo, p2, k1, p2, yo, k2 (11 sts).
• Row 2: K2, p1, k2, k1, k2, p1, k2.
• Row 3: K2, yo, k1, p2, yo, k1, yo, p2, k1, yo, k2 (15 sts).
• Row 4: K2, k1, p1, k2, p1, k1, p1, k2, p1, k1, k2.
• Row 5: K2, yo, p1, k1, p2, k1, yo, k1, yo, k1, p2, k1, p1, yo, k2 (19 sts).
• Row 6: K2, k2, p1, k2, p2, k1, p2, k2, p1, k2, k2.
• Row 7: K2, yo, p2, k1, p2, k2, yo, k1, yo, k2, p2, k1, p2, yo, k2 (23 sts).
• Row 8: K2, k1, p3, k2, p3, k1, p3, k2, p3, k1, k2.
• Row 9: K2, yo, k4, p2, k3, yo, k1, yo, k3, p2, k4, yo, k2 (27 sts).
• Row 10: K2, k1, p4, k2, p4, k1, p4, k2, p4, k1, k2.
• Row 11: K2, yo, k5, p2, k4, yo, k1, yo, k4, p2, k5, yo, k2 (31 sts).
• Row 12: K2, k1, p5, k2, p5, k1, p5, k2, p5, k1, k2.
• Row 13: K2, yo, k6, p2, k5, yo, k1, yo, k5, p2, k6, yo, k2 (35 sts).
• Row 14: K2, p7, k2, p6, k1, p6, k2, p7, k2.
• Row 15: K2, yo, ssk, yo, p1, 2/2 RC, p2, 2/2 LC, p2, yo, k1, yo, p2, 2/2 RC, p2, 2/2 LC, p1, yo, k2tog, yo, k2 (39 sts).
• Row 17: K2, yo, p1, k1, p2, k4, p2, k4, p2, k1, yo, k1, yo, k1, p2, k4, p2, k4, p2, k1, p1, yo, k2 (43 sts).
• Row 18: K2, k2, p1, k2, p4, k2, p4, k2, p1, k1, k1, k1, p1, k2, p4, k2, p4, k2, p1, k2, k2.
• Row 19: K2, yo, p2, k1, p2, 2/2 RC, p2, 2/2 LC, p2, k1, p1, yo, k1, yo, p1, k1, p2, 2/2 LC, p2, 2/2 RC, p2, k1, p2, yo, k2 (47 sts).
• Row 20: K2, p1, k2, p1, k2, p4, k2, p4, k2, p1, k2, k1, k2, p1, k2, p4, k2, p4, k2, p1, k2, p1, k2.