Shown with a cast-on count of 81 stitches.  

• Rows 1, 3, 5, 7, 9, 11, 13, 15, and 17 (RS): [K2, p2] 20 times, k1.
• Rows 2, 4, 6, 8, 10, 12, 14, and 16: [P1, k2, p1] 20 times, p1.
• Row 18: Drop st, drop st, drop st, drop st, drop st, drop st, drop st, drop st, drop st, drop st, drop st, drop st, p69 (69 sts).
• Rows 19 and 23: K69.
• Rows 20, 22, and 24: P69.
• Row 21: K4, [MB, k5] 10 times, MB, k4.
• Rows 26 and 28: P69.
• Row 27: K69.