Shown with a cast-on count of 65 stitches.  

• Rows 1, 3, 19, 21, 23, 25, 41, and 43 (RS): Knit.
• Rows 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, and 22: P13, *k13, p13, repeat from *.
• Row 5: K6, *p1, k25, repeat from * to last 7 sts, p1, k6.
• Row 7: K5, *p3, k23, repeat from * to last 8 sts, p3, k5.
• Row 9: K4, *p5, k21, repeat from * to last 9 sts, p5, k4.
• Row 11: K3, *p7, k19, repeat from * to last 10 sts, p7, k3.
• Row 13: K2, *p9, k17, repeat from * to last 11 sts, p9, k2.
• Row 15: K2, *p4, k1, p4, k17, repeat from * to last 11 sts, p4, k1, p4, k2.
• Row 17: K3, *p2, k3, p2, k19, repeat from * to last 10 sts, p2, k3, p2, k3.
• Rows 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, and 44: K13, *p13, k13, repeat from *.
• Row 27: K19, *p1, k25, repeat from * to last 20 sts, p1, k19.
• Row 29: K18, *p3, k23, repeat from * to last 21 sts, p3, k18.
• Row 31: K17, *p5, k21, repeat from * to last 22 sts, p5, k17.
• Row 33: K16, *p7, k19, repeat from * to last 23 sts, p7, k16.
• Row 35: K15, *p9, k17, repeat from * to last 24 sts, p9, k15.
• Row 37: K15, *p4, k1, p4, k17, repeat from * to last 24 sts, p4, k1, p4, k15.
• Row 39: K16, *p2, k3, p2, k19, repeat from * to last 23 sts, p2, k3, p2, k16.
• Repeat rows 1-44.