Shown with a cast-on count of 3 stitches.  

• Rows 1 and 23 (RS): Kfb, k1, kfb (5 sts).
• Rows 2, 4, 6, 8, 10, 12, 14, 16, 18, 24, 26, 28, 30, 36, 38, and 44: Knit.
• Rows 3 and 25: Kfb, k3, kfb (7 sts).
• Row 5: K6, kfb (8 sts).
• Rows 7 and 9: K2tog, k5, kfb.
• Rows 11, 37, and 47: Knit.
• Rows 13 and 15: Kfb, k5, k2tog.
• Row 17: K6, k2tog (7 sts).
• Row 19: K2tog, k3, k2tog (5 sts).
• Row 20: K2tog, k1, k2tog (3 sts).
• Row 21: Sl2-k1-p2sso (1 st).
• Row 22: Ctr dbl inc (3 sts).
• Row 27: Kfb, k5, kfb (9 sts).
• Row 29: K8, kfb (10 sts).
• Rows 31, 33, and 35: K9, kfb (11 sts).
• Rows 32 and 34: K9, k2tog (10 sts).
• Rows 39, 41, and 43: K9, k2tog (10 sts).
• Rows 40 and 42: K9, kfb (11 sts).
• Row 45: K8, k2tog (9 sts).
• Row 46: K2tog, k5, k2tog (7 sts).
• Row 48: K2tog, k3, k2tog (5 sts).
• Row 49: K2tog, k1, k2tog (3 sts).