Shown with a cast-on count of 4 stitches.  

• Row 1 (RS): K4.
• Row 2: K1, yo, k2, yo, (p1, k1) in next st (7 sts).
• Row 3: K7.
• Row 4: K1, yo, k1, yo, k2, yo, k2, yo, (p1, k1) in next st (12 sts).
• Row 5: K12.
• Row 6: K1, yo, k3, yo, k2, yo, k5, yo, (p1, k1) in next st (17 sts).
• Row 7: K17.
• Row 8: K1, yo, k5, yo, k2, yo, k8, yo, (p1, k1) in next st (22 sts).
• Row 9: K22.
• Row 10: K1, yo, k7, yo, k2, yo, k11, yo, (p1, k1) in next st (27 sts).
• Row 11: K27.
• Row 12: K1, yo, k9, yo, k2, yo, k14, yo, (p1, k1) in next st (32 sts).
• Row 13: K32.