Shown with a cast-on count of 35 stitches.  

• Rows 1, 3, 5, 7, and 9 (RS): P11, *k1, p11, repeat from *.
• Rows 2, 4, 6, 8, and 10: K11, *p1, k11, repeat from *.
• Row 11: P4, *sl2-k1-p2sso, p9, repeat from * to last 7 sts, sl2-k1-p2sso, p4 (multiple of 10 sts, plus 9).
• Rows 12, 14, 16, 18, and 20: K4, *p1, k9, repeat from * to last 5 sts, p1, k4.
• Rows 13, 15, 17, and 19: P4, *k1, p9, repeat from * to last 5 sts, k1, p4.
• Row 21: P8, *sl2-k1-p2sso, p7, repeat from * to last st, p1 (multiple of 8 sts, plus 9).
• Rows 22, 24, 26, 28, and 30: K8, *p1, k7, repeat from * to last st, k1.
• Rows 23, 25, 27, and 29: P8, *k1, p7, repeat from * to last st, p1.
• Row 31: P3, *sl2-k1-p2sso, p5, repeat from * to last 6 sts, sl2-k1-p2sso, p3 (multiple of 6 sts, plus 7).
• Rows 32, 34, 36, 38, and 40: K3, *p1, k5, repeat from * to last 4 sts, p1, k3.
• Rows 33, 35, 37, and 39: P3, *k1, p5, repeat from * to last 4 sts, k1, p3.