Shown with a cast-on count of 45 stitches.  

• Row 1 (RS): K45.
• Rows 2, 4, 6, 8, 10, 12, 14, 16, 22, 24, 26, 28, 30, and 32: K21, turn (21 sts).
• Rows 3, 17, and 21: K16, turn (16 sts).
• Rows 5, 15, 23, and 33: K18, turn (18 sts).
• Rows 7, 13, 25, and 31: K19, turn (19 sts).
• Rows 9, 11, 27, and 29: K20, turn (20 sts).
• Row 18: K20, turn (20 sts).
• Row 19: K42 (42 sts).
• Row 20: K31, turn (31 sts).
• Row 34: K18.
• Row 35: K45 (45 sts).
• Row 36: K45.