Shown with a cast-on count of 6 stitches.  

• Round 1: [Kfb] 6 times (12 sts).
• Round 2: [Kfb] 12 times (24 sts).
• Rounds 3, 5, 7, 9-26, 28-29, 31, and 33: Knit.
• Round 4: [Kfb, k2] 8 times (32 sts).
• Round 6: [Kfb, k3] 8 times (40 sts).
• Round 8: [Kfb, k4] 8 times (48 sts).
• Round 27: [K2tog, k4] 8 times (40 sts).
• Round 30: [K2tog, k3] 8 times (32 sts).
• Round 32: [K2tog, k2] 8 times (24 sts).
• Round 34: [K2tog, k1] 8 times (16 sts).
• Round 35: [K2tog] 8 times (8 sts).