Shown with a cast-on count of 24 stitches.  

• Round 1: P4, pfb, p19 (25 sts).
• Round 2: P4, k1, p20.
• Round 3: P4, 1/2 LC, p18.
• Round 4: P4, k3, p18.
• Round 5: P4, 3/2 LC, p16.
• Round 6: P4, k1, pfb, k3, p16 (26 sts).
• Round 7: P4, 3/2 LPC, k3, p14.
• Round 8: P4, k3, p2, k3, p14.
• Round 9: P4, 3/2 LPC, 3/2 LC, p12.
• Round 10: P4, k1, pfb, k3, p2, k3, p12 (27 sts).
• Round 11: P4, k3, 3/2 LPC, 3/2 LPC, p10.
• Round 12: P4, k3, p2, k3, p2, k3, p10.
• Round 13: P4, 3/2 LPC, 3/2 LPC, 3/2 LPC, p8.
• Rounds 14-18: P6, k3, p2, k3, p2, k3, p8.
• Round 19: P5, 3/1 RPC, p1, 3/1 RPC, p1, 3/1 RPC, p8.
• Round 20: P5, k3, p2, k3, p2, k3, p9.
• Round 21: P3, 3/2 RPC, p1, 3/1 RPC, p1, 3/1 RPC, p9.
• Round 22: P3, k3, p2, k3, p3, k3, p10.
• Round 23: P1, 3/2 RPC, p1, 3/2 RPC, p1, 3/1 RPC, p10.
• Round 24: P1, k3, p3, k3, p3, k3, p11.
• Round 25: 3/1 RPC, p1, 3/2 RPC, p2, 3/1 RPC, p11.
• Rounds 26-30: K3, p2, k3, p4, k3, p12.
• Round 31: 3/1 LPC, p3, 3/1 LPC, p1, 3/1 LPC, p11.
• Round 32: P1, k3, p2, k3, p4, k3, p11.
• Round 33: P1, 3/1 LPC, p3, 3/1 LPC, p1, 3/2 LPC, p9.
• Round 34: P2, k3, p2, k3, p5, k3, p9.
• Round 35: P2, 3/1 LPC, p1, 3/2 LPC, p3, 3/2 LPC, p7.
• Round 36: P3, k3, p3, k3, p5, k3, p7.
• Round 37: P3, 3/1 LPC, p2, 3/2 LPC, p3, 3/1 LPC, p6.
• Rounds 38-41: P4, k3, p4, k3, p4, k3, p6.
• Round 42: P2tog, p2, k3, p4, k3, p4, k3, p5, k1 (26 sts).
• Round 43: P3, k3, p4, k3, p4, k3, p3, 1/2 LC.
• Rounds 44-45: P3, k3, p4, k3, p4, k3, p3, k3.