Shown with a cast-on count of 41 stitches.  

• Row 1 (RS): *P3, k15, p2, repeat from * to last st, p1.
• Row 2: K1, *k3, p13, k4, repeat from *.
• Rows 3, 5, 13, and 15: *P5, k11, p4, repeat from * to last st, p1.
• Rows 4 and 14: K1, *k4, p11, k5, repeat from *.
• Rows 6, 12, and 16: K1, *k3, p4, k5, p4, k4, repeat from *.
• Rows 7, 11, and 17: *P3, k4, p7, k4, p2, repeat from * to last st, p1.
• Rows 8, 10, 18, and 20: P1, *p5, k9, p6, repeat from *.
• Rows 9 and 19: *K6, p9, k5, repeat from * to last st, k1.
• Row 21: *K7, p7, k6, repeat from * to last st, k1.
• Row 22: P1, *p7, k5, p8, repeat from *.
• Repeat rows 3-12.