Shown with a cast-on count of 3 stitches.  

• Row 1 (RS): K3.
• Row 2: P3.
• Row 3: M1R, k3, M1L (5 sts).
• Rows 4 and 20: P5.
• Row 5: M1R, k5, M1L (7 sts).
• Rows 6, 18, and 22: P7.
• Row 7: M1R, k7, M1L (9 sts).
• Rows 8, 16, and 24: P9.
• Row 9: M1R, k9, M1L (11 sts).
• Rows 10, 14, and 26: P11.
• Row 11: M1R, k11, M1L (13 sts).
• Rows 12 and 28: P13.
• Row 13: Ssk, k9, k2tog (11 sts).
• Row 15: Ssk, k7, k2tog (9 sts).
• Row 17: Ssk, k5, k2tog (7 sts).
• Row 19: Ssk, k3, k2tog (5 sts).
• Row 21: K1, M1L, k3, M1R, k1 (7 sts).
• Row 23: K2, M1L, k3, M1R, k2 (9 sts).
• Row 25: K3, M1L, k3, M1R, k3 (11 sts).
• Row 27: K4, M1L, k3, M1R, k4 (13 sts).