Shown with a cast-on count of 48 stitches.  

• Rows 1, 5, and 9 (RS): *P8, k9, [p1, k1] 3 times, p1, repeat from *.
• Rows 2, 6, and 10: *K1, [p1, k1] 3 times, p9, k8, repeat from *.
• Rows 3, 7, and 11: *P8, k8, [p1, k1] 4 times, repeat from *.
• Rows 4, 8, and 12: *[P1, k1] 4 times, p8, k8, repeat from *.
• Rows 13, 17, and 21: *K9, [p1, k1] 3 times, p9, repeat from *.
• Rows 14, 18, and 22: *K9, [p1, k1] 3 times, p9, repeat from *.
• Rows 15, 19, and 23: *K8, [p1, k1] 4 times, p8, repeat from *.
• Rows 16, 20, and 24: *K8, [p1, k1] 4 times, p8, repeat from *.
• Rows 25, 29, and 33: *K1, [p1, k1] 3 times, p9, k8, repeat from *.
• Rows 26, 30, and 34: *P8, k9, [p1, k1] 3 times, p1, repeat from *.
• Rows 27, 31, and 35: *[P1, k1] 4 times, p8, k8, repeat from *.
• Rows 28, 32, and 36: *P8, k8, [p1, k1] 4 times, repeat from *.
• Repeat rows 1-36.