Shown with a cast-on count of 45 stitches.  

• Row 1 (RS): P4, k1, *p11, k1, repeat from * to last 4 sts, p4.
• Row 2: K3, p3, *k9, p3, repeat from * to last 3 sts, k3.
• Row 3: P3, k3, *p9, k3, repeat from * to last 3 sts, p3.
• Row 4: K2, p5, *k7, p5, repeat from * to last 2 sts, k2.
• Row 5: P1, k7, *p5, k7, repeat from * to last st, p1.
• Rows 6 and 8: P9, *k3, p9, repeat from *.
• Row 7: K9, *p3, k9, repeat from *.
• Row 9: K4, p1, *k4, p3, k4, p1, repeat from * to last 4 sts, k4.
• Row 10: K1, p2, k3, p2, *k2, p1, k2, p2, k3, p2, repeat from * to last st, k1.
• Row 11: P10, *k1, p11, repeat from * to last 11 sts, k1, p10.
• Row 12: K9, *p3, k9, repeat from *.
• Row 13: P9, *k3, p9, repeat from *.
• Row 14: P1, k7, *p5, k7, repeat from * to last st, p1.
• Row 15: K2, p5, *k7, p5, repeat from * to last 2 sts, k2.
• Rows 16 and 18: P3, k3, *p9, k3, repeat from * to last 3 sts, p3.
• Row 17: K3, p3, *k9, p3, repeat from * to last 3 sts, k3.
• Row 19: K3, p3, *k4, p1, k4, p3, repeat from * to last 3 sts, k3.
• Row 20: P2, k2, p1, k2, *p2, k3, p2, k2, p1, k2, repeat from * to last 2 sts, p2.