Shown with a cast-on count of 5 stitches.  

• Row 1 (WS): K2, p1, k2.
• Row 2: K2, M1L, k1, M1R, k2 (7 sts).
• Row 3: K2, p3, k2.
• Row 4: K2, M1L, k1, M1R, k1, M1L, k1, M1R, k2 (11 sts).
• Rows 5, 7, 9, and 11: K2, purl to last 2 sts, k2.
• Row 6: K2, M1L, k3, M1R, k1, M1L, k3, M1R, k2 (15 sts).
• Row 8: K2, M1L, k5, M1R, k1, M1L, k5, M1R, k2 (19 sts).
• Row 10: K2, M1L, k7, M1R, k1, M1L, k7, M1R, k2 (23 sts).
• Row 12: Knit.
• Row 13: K2, M1L, k9, M1R, k1, M1L, k9, M1R, k2 (27 sts).
• Row 14: K2, M1L, k11, M1R, k1, M1L, k11, M1R, k2 (31 sts).
• Row 15: K2, M1L, k13, M1R, k1, M1L, k13, M1R, k2 (35 sts).
• Row 16: K2, M1L, k15, M1R, k1, M1L, k15, M1R, k2 (39 sts).
• Row 17: K2, M1L, k17, M1R, k1, M1L, k17, M1R, k2 (43 sts).
• Row 18: K2, M1L, k19, M1R, k1, M1L, k19, M1R, k2 (47 sts).
• Row 19: K2, M1L, k21, M1R, k1, M1L, k21, M1R, k2 (51 sts).
• Row 20: K2, M1L, k23, M1R, k1, M1L, k23, M1R, k2 (55 sts).