Shown with a cast-on count of 2 stitches.  

• Row 1 (RS): Kfb, knit (3 sts).
• Row 2: K1, kfb, knit (4 sts).
• Row 3: K1, kfb, knit (5 sts).
• Row 4: K1, kfb, knit (6 sts).
• Row 5: K1, kfb, yo, k2tog, yo, k2 (8 sts).
• Rows 6, 8, 10, 12, 16, 18, 20, 22, 26, 28, 30, 32, 36, 38, 40, 42, 46, 48, 50, 52, 56, 58, 60, and 62: Knit.
• Row 7: K1, kfb, [yo, k2tog] twice, yo, k2 (10 sts).
• Row 9: K1, kfb, [yo, k2tog] 3 times, yo, k2 (12 sts).
• Rows 11 and 25: K1, kfb, [yo, k2tog] 4 times, yo, k2 (14 sts).
• Row 13: K1, kfb, knit (15 sts).
• Row 14: BO 6 sts, knit (9 sts).
• Row 15: K1, kfb, knit to last 6 sts, [yo, k2tog] twice, yo, k2 (11 sts).
• Row 17: K1, kfb, knit to last 8 sts, [yo, k2tog] 3 times, yo, k2 (13 sts).
• Row 19: K1, kfb, knit to last 10 sts, [yo, k2tog] 4 times, yo, k2 (15 sts).
• Row 21: K1, kfb, knit to last 10 sts, [yo, k2tog] 4 times, yo, k2 (17 sts).
• Row 23: K1, kfb, knit (18 sts).
• Row 24: BO 6 sts, knit (12 sts).
• Row 27: K1, kfb, [yo, k2tog] 5 times, yo, k2 (16 sts).
• Row 29: K1, kfb, knit to last 12 sts, [yo, k2tog] 5 times, yo, k2 (18 sts).
• Row 31: K1, kfb, knit to last 10 sts, [yo, k2tog] 4 times, yo, k2 (20 sts).
• Row 33: K1, kfb, knit (21 sts).
• Row 34: BO 6 sts, knit (15 sts).
• Row 35: K1, kfb, knit to last 12 sts, [yo, k2tog] 5 times, yo, k2 (17 sts).
• Row 37: K1, kfb, knit to last 14 sts, [yo, k2tog] 6 times, yo, k2 (19 sts).
• Row 39: K1, kfb, knit to last 12 sts, [yo, k2tog] 5 times, yo, k2 (21 sts).
• Row 41: K1, kfb, knit to last 10 sts, [yo, k2tog] 4 times, yo, k2 (23 sts).
• Row 43: K1, kfb, knit (24 sts).
• Row 44: BO 6 sts, knit (18 sts).
• Row 45: K1, kfb, [yo, k2tog] 7 times, yo, k2 (20 sts).
• Row 47: K1, kfb, knit to last 14 sts, [yo, k2tog] 6 times, yo, k2 (22 sts).
• Row 49: K1, kfb, knit to last 12 sts, [yo, k2tog] 5 times, yo, k2 (24 sts).
• Row 51: K1, kfb, knit to last 10 sts, [yo, k2tog] 4 times, yo, k2 (26 sts).
• Row 53: K1, kfb, knit (27 sts).
• Row 54: BO 6 sts, knit (21 sts).
• Row 55: K1, kfb, knit to last 16 sts, [yo, k2tog] 7 times, yo, k2 (2 more sts).
• Row 57: K1, kfb, knit to last 14 sts, [yo, k2tog] 6 times, yo, k2 (2 more sts).
• Row 59: K1, kfb, knit to last 12 sts, [yo, k2tog] 5 times, yo, k2 (2 more sts).
• Row 61: K1, kfb, knit to last 10 sts, [yo, k2tog] 4 times, yo, k2 (2 more sts).
• Row 63: K1, kfb, knit (1 more st).
• Row 64: BO 6 sts, knit (6 fewer sts).
• Repeat rows 55-64.