Shown with a cast-on count of 42 stitches.  

• Row 1 (RS): K2, [p2, yo, k1, yo, p2, k2, k2tog, k3] 3 times, p2, k2 (45 sts).
• Row 2: K4, [p6, k2, p3, k2] 3 times, k2.
• Rows 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, and 36 (WS): Purl.
• Row 4: K2, [p2, k1, [yo, k1] twice, p2, k2, k2tog, k2] 3 times, p2, k2 (48 sts).
• Rows 5 and 23: K4, [[p5, k2] twice] 3 times, k2.
• Row 7: K2, [p2, k2, yo, k1, yo, k2, p2, k2, k2tog, k1] 3 times, p2, k2 (51 sts).
• Row 8: K4, [p4, k2, p7, k2] 3 times, k2.
• Row 10: K2, [p2, k3, yo, k1, yo, k3, p2, k2, k2tog] 3 times, p2, k2 (54 sts).
• Row 11: K4, [p3, k2, p9, k2] 3 times, k2.
• Row 13: K2, [p2, k2, k2tog, k5, p2, k1, k2tog] 3 times, p2, k2 (48 sts).
• Row 14: K4, [p2, k2, p8, k2] 3 times, k2.
• Row 16: K2, [p2, k2, k2tog, k4, p2, k2tog] 3 times, p2, k2 (42 sts).
• Row 17: K4, [p1, k2, p7, k2] 3 times, k2.
• Row 19: K2, [p2, k2, k2tog, k3, p2, yo, k1, yo] 3 times, p2, k2 (45 sts).
• Row 20: K4, [p3, k2, p6, k2] 3 times, k2.
• Row 22: K2, [p2, k2, k2tog, k2, p2, [k1, yo] twice, k1] 3 times, p2, k2 (48 sts).
• Row 25: K2, [p2, k2, k2tog, k1, p2, k2, yo, k1, yo, k2] 3 times, p2, k2 (51 sts).
• Row 26: K4, [p7, k2, p4, k2] 3 times, k2.
• Row 28: K2, [p2, k2, k2tog, p2, k3, yo, k1, yo, k3] 3 times, p2, k2 (54 sts).
• Row 29: K4, [p9, k2, p3, k2] 3 times, k2.
• Row 31: K2, [p2, k1, k2tog, p2, k2, k2tog, k5] 3 times, p2, k2 (48 sts).
• Row 32: K4, [p8, k2, p2, k2] 3 times, k2.
• Row 34: K2, [p2, k2tog, p2, k2, k2tog, k4] 3 times, p2, k2 (42 sts).
• Row 35: K4, [p7, k2, p1, k2] 3 times, k2.