Shown with a cast-on count of 19 stitches.  

• Row 1 (RS): Sl1 wyif, k18.
• Row 2: Sl1 wyif, p18.
• Row 3: Sl1 wyib, k16, turn (17 sts).
• Rows 4 and 34: P15, turn (15 sts).
• Rows 5 and 33: K14, turn (14 sts).
• Rows 6 and 32: P13, turn (13 sts).
• Rows 7 and 31: K12, turn (12 sts).
• Rows 8, 20, and 30: P11, turn (11 sts).
• Rows 9, 19, 21, and 29: K10, turn (10 sts).
• Rows 10, 18, 22, and 28: P9, turn (9 sts).
• Rows 11 and 23: K8, turn (8 sts).
• Rows 12 and 24: P7, turn (7 sts).
• Rows 15 and 25: Knit (13 sts).
• Rows 16, 26, and 38: Sl1 wyif, purl (19 sts).
• Rows 17 and 27: Sl1 wyib, k13, turn (14 sts).
• Row 35: K16, turn (16 sts).
• Row 36: P17, turn (17 sts).
• Row 37: Knit (18 sts).