Shown with a cast-on count of 40 stitches.  

• Round 1: [K1, p1] 20 times.
• Rounds 2-8: *K1, p1, repeat from *.
• Rounds 9, 11, 13, 15, 17, 19, 21, 23, 25, and 27: Knit.
• Round 10: K1, M1L, k23, M1R, k1, M1L, k15, M1R (44 sts).
• Round 12: K1, M1L, k25, M1R, k1, M1L, k17, M1R (48 sts).
• Round 14: K1, M1L, k27, M1R, k1, M1L, k19, M1R (52 sts).
• Round 16: K1, M1L, k29, M1R, k1, M1L, k21, M1R (56 sts).
• Round 18: K1, M1L, k31, M1R, k1, M1L, k23, M1R (60 sts).
• Round 20: K1, M1L, k33, M1R, k1, M1L, k25, M1R (64 sts).
• Round 22: K1, M1L, k35, M1R, k1, M1L, k27, M1R (68 sts).
• Rounds 24, 26, and 28: K1, k37, k1, p29.