Shown with a cast-on count of 27 stitches.  

• Rows 1, 3, and 41 (WS): K27.
• Rows 2, 40, and 42: P27.
• Row 4: P13, M1R, ctr dbl inc, M1L, p13 (31 sts).
• Row 5: K13, p2, k1, p2, k13.
• Row 6: P10, 2/3 RC, p1, 2/3 LC, p10.
• Rows 7 and 37: K10, [p2, k1] 3 times, p2, k10.
• Row 8: P8, 2/2 RPC, [p1, k2] twice, p1, 2/2 LPC, p8.
• Rows 9 and 35: K8, p2, k3, purl to last 16 sts, k1, p2, k3, p2, k8.
• Row 10: P7, 2/1 RPC, p3, 2/1/2 RPC, p3, 2/1 LPC, p7.
• Rows 11, 13, 31, and 33: K7, p2, k4, p2, k1, p2, k4, p2, k7.
• Rows 12 and 32: P7, k2, p4, k2, p1, k2, p4, k2, p7.
• Row 14: P7, 2/1 LPC, k1, p2, k2, p1, k2, p2, k1, 2/1 RPC, p7.
• Rows 15 and 29: K8, wrap 3 sts, k2, p2, k1, p2, k2, wrap 3 sts, k8.
• Row 16: P5, 2/3 RC, k1, p2, 2/1/2 RPC, p2, k1, 2/3 LC, p5.
• Rows 17 and 27: K5, [p2, k2] twice, p2, k1, [p2, k2] twice, p2, k5.
• Row 18: P3, 2/2 RPC, p2, 2/2 LPC, k2, p1, k2, 2/2 RPC, p2, 2/2 LPC, p3.
• Rows 19 and 25: K3, p2, k6, p4, k1, p4, k6, p2, k3.
• Row 20: P2, 2/1 RPC, p6, 2/2 LPC, p1, 2/2 RPC, p6, 2/1 LPC, p2.
• Rows 21 and 23: K2, p2, k9, p2, k1, p2, k9, p2, k2.
• Row 22: P2, k2, p9, 2/1/2 LPC, p9, k2, p2.
• Row 24: P2, 2/1 LPC, p6, 2/2 RPC, p1, 2/2 LPC, p6, 2/1 RPC, p2.
• Row 26: P3, 2/2 LPC, p2, 2/2 RPC, k2, p1, k2, 2/2 LPC, p2, 2/2 RPC, p3.
• Row 28: P5, 2/3 LPC, k1, p2, 2/1/2 RPC, p2, k1, 2/3 RPC, p5.
• Row 30: P7, 2/1 RPC, p3, k2, p1, k2, p3, 2/1 LPC, p7.
• Row 34: P7, 2/1 LPC, p3, 2/1/2 RPC, p3, 2/1 RPC, p7.
• Row 36: P8, 2/2 LPC, [p1, k2] twice, p1, 2/2 RPC, p8.
• Row 38: P10, 2/3 LPC, p1, 2/3 RPC, p10.
• Row 39: K13, p5tog, k13 (27 sts).