Shown with a cast-on count of 3 stitches.  

• Row 1 (RS): K1, yo, k1, yo, k1 (5 sts).
• Rows 2, 4, 6, 8, 10, 12, 14, and 16: Knit.
• Row 3: K1, [yo, k1] 4 times (9 sts).
• Row 5: K3, [yo, k3] twice (11 sts).
• Row 7: K3, yo, knit to last 3 sts, yo, k3 (13 sts).
• Row 9: K3, yo, knit to last 3 sts, yo, k3 (15 sts).
• Row 11: K3, yo, knit to last 3 sts, yo, k3 (17 sts).
• Row 13: K3, yo, knit to last 3 sts, yo, k3 (19 sts).
• Row 15: K3, yo, knit to last 3 sts, yo, k3 (21 sts).
• Row 17: K3, yo, k7, kfb, k7, yo, k3 (24 sts).
• Row 18: K11, p2, k11.
• Row 19: K3, yo, knit to last 3 sts, yo, k3 (26 sts).
• Row 20: K11, p4, k11.
• Row 21: K3, yo, knit to last 3 sts, yo, k3 (28 sts).
• Row 22: K11, p6, k11.
• Row 23: K3, yo, p8, 3/3 RC, p8, yo, k3 (30 sts).
• Row 24: K12, p6, k12.
• Row 25: K3, yo, p9, k6, p9, yo, k3 (32 sts).
• Row 26: K13, p6, k13.
• Row 27: K3, yo, p10, 3/3 RC, p10, yo, k3 (34 sts).
• Row 28: K14, p6, k14.
• Row 29: K3, yo, p8, 3/3 RC, 3/3 LC, p8, yo, k3 (36 sts).
• Row 30: K12, p3, k6, p3, k12.
• Row 31: K3, yo, p6, 3/3 RC, p6, 3/3 LC, p6, yo, k3 (38 sts).
• Row 32: K10, p6, k6, p6, k10.
• Row 33: K3, yo, p4, [3/3 RC, 3/3 LC] twice, p4, yo, k3 (40 sts).
• Row 34: K8, [p6, k3] twice, p6, k8.
• Row 35: K3, yo, p2, 3/3 RC, k3, p3, 3/3 RC, p3, k3, 3/3 LC, p2, yo, k3 (42 sts).
• Row 36: K6, p3, k3, p3, k3, p6, k3, p3, k3, p3, k6.
• Row 37: K3, yo, p3, [k3, p3] twice, k6, [p3, k3] twice, p3, yo, k3 (44 sts).
• Row 38: K7, [p3, k3] twice, p6, [k3, p3] twice, k7.
• Row 39: K3, yo, p4, [k3, p3] twice, k6, [p3, k3] twice, p4, yo, k3 (46 sts).
• Row 40: K8, [p3, k3] twice, p6, [k3, p3] twice, k8.
• Row 41: K3, yo, p5, k3, [3/3 RC, p3] twice, 3/3 LC, k3, p5, yo, k3 (48 sts).
• Row 42: K9, p6, k6, p6, k6, p6, k9.
• Row 43: K3, yo, p6, 3/3 RC, p3, 3/3 RC, 3/3 LC, p3, 3/3 LC, p6, yo, k3 (50 sts).