Shown with a cast-on count of 9 stitches.  

• Row 1 (RS): K3, yo, k1, yo, k1, yo, k1, yo, k3 (13 sts).
• Rows 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46, 48, and 50: K3, purl to last 3 sts, k3.
• Row 3: K3, yo, k2, yo, k3, yo, k2, yo, k3 (17 sts).
• Row 5: K3, yo, k3, yo, k5, yo, k3, yo, k3 (21 sts).
• Row 7: K3, yo, k4, yo, k7, yo, k4, yo, k3 (25 sts).
• Row 9: K3, yo, k5, yo, k9, yo, k5, yo, k3 (29 sts).
• Row 11: K3, yo, k6, yo, k11, yo, k6, yo, k3 (33 sts).
• Row 13: K3, yo, k7, yo, k13, yo, k7, yo, k3 (37 sts).
• Row 15: K3, yo, k8, yo, k15, yo, k8, yo, k3 (41 sts).
• Row 17: K3, yo, k9, yo, k17, yo, k9, yo, k3 (45 sts).
• Row 19: K3, yo, k10, yo, k19, yo, k10, yo, k3 (49 sts).
• Row 21: K3, yo, k11, yo, k21, yo, k11, yo, k3 (53 sts).
• Row 23: K3, yo, k12, yo, k23, yo, k12, yo, k3 (57 sts).
• Row 25: K3, yo, k13, yo, k25, yo, k13, yo, k3 (61 sts).
• Row 27: K3, yo, k14, yo, k27, yo, k14, yo, k3 (65 sts).
• Row 29: K3, yo, k15, yo, k29, yo, k15, yo, k3 (69 sts).
• Row 31: K3, yo, k16, yo, k31, yo, k16, yo, k3 (73 sts).
• Row 33: K3, yo, k17, yo, k33, yo, k17, yo, k3 (77 sts).
• Row 35: K3, yo, k18, yo, k35, yo, k18, yo, k3 (81 sts).
• Row 37: K3, yo, k19, yo, k37, yo, k19, yo, k3 (85 sts).
• Row 39: K3, yo, k20, yo, k39, yo, k20, yo, k3 (89 sts).
• Row 41: K3, yo, k21, yo, k41, yo, k21, yo, k3 (93 sts).
• Row 43: K3, yo, k22, yo, k43, yo, k22, yo, k3 (97 sts).
• Row 45: K3, yo, k23, yo, k45, yo, k23, yo, k3 (101 sts).
• Row 47: K3, yo, k24, yo, k47, yo, k24, yo, k3 (105 sts).
• Row 49: K3, yo, k25, yo, k49, yo, k25, yo, k3 (109 sts).