Shown with a cast-on count of 2 stitches.  

• Row 1 (WS): P1, pfb (3 sts).
• Row 2: K3.
• Row 3: P1, pfb, p1 (4 sts).
• Row 4: K4.
• Row 5: P1, pfb, p2 (5 sts).
• Row 6: K5.
• Row 7: P1, pfb, p3 (6 sts).
• Row 8: K6.
• Row 9: Pfb, pfb, p4 (8 sts).
• Row 10: K8.
• Row 11: P1, pfb, pfb, p5 (10 sts).
• Row 12: K10.
• Row 13: P2, pfb, pfb, p6 (12 sts).
• Row 14: K12.
• Row 15: P3, pfb, pfb, p7 (14 sts).
• Row 16: K14.
• Row 17: P4, pfb, p9 (15 sts).
• Row 18: K7, k2tog, k6 (14 sts).
• Row 19: P5, pfb, pfb, p7 (16 sts).
• Row 20: K6, k2tog, k8 (15 sts).
• Rows 21, 25, 27, 29, and 31: P6, pfb, pfb, p7 (17 sts).
• Row 22: K5, k2tog, k10 (16 sts).
• Row 23: P8, pfb, p7 (17 sts).
• Row 24: K4, k2tog, k3, ssk, k6 (15 sts).
• Row 26: K3, k2tog, k5, ssk, k5 (15 sts).
• Row 28: K2, k2tog, k7, ssk, k4 (15 sts).
• Row 30: K1, k2tog, k9, ssk, k3 (15 sts).
• Row 32: K2tog, k11, ssk, k2 (15 sts).