Shown with a cast-on count of 80 stitches.  

• Round 1: [K1, p1] 40 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] twice (88 sts).
• Round 12: [K1, M1L, k25, M1R, k1, M1L, k17, M1R] twice (96 sts).
• Round 14: [K1, M1L, k27, M1R, k1, M1L, k19, M1R] twice (104 sts).
• Round 16: [K1, M1L, k29, M1R, k1, M1L, k21, M1R] twice (112 sts).
• Round 18: [K1, M1L, k31, M1R, k1, M1L, k23, M1R] twice (120 sts).
• Round 20: [K1, M1L, k33, M1R, k1, M1L, k25, M1R] twice (128 sts).
• Round 22: [K1, M1L, k35, M1R, k1, M1L, k27, M1R] twice (136 sts).
• Rounds 24, 26, and 28: [K39, p29] twice.
• Round 29: [K39, BO 28 sts] twice (80 sts).