Shown with a cast-on count of 2 stitches.  

• Row 1 (RS): *K1, p1, repeat from *.
• Rows 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, and 42: *K1, p1, repeat from *.
• Row 3: (K1, yo, k1) in next st, p1 (4 sts).
• Row 5: (K1, yo, k1) in next st, p1, k1, p1 (6 sts).
• Row 7: (K1, yo, k1) in next st, p1, [k1, p1] twice (8 sts).
• Row 9: (K1, yo, k1) in next st, p1, k3tog, p1, 1-to-9 inc, p1 (16 sts).
• Rows 11, 13, and 15: (K1, yo, k1) in next st, p1, k3tog, p1, [k1, p1] 5 times.
• Row 17: (K1, yo, k1) in next st, p1, 1-to-9 inc, p1, sl1-k2tog-psso, p1, [k1, p1] 4 times (24 sts).
• Row 19: (K1, yo, k1) in next st, p1, [k1, p1] 6 times, sl1-k2tog-psso, p1, [k1, p1] 3 times.
• Row 21: (K1, yo, k1) in next st, p1, [k1, p1] 7 times, sl1-k2tog-psso, p1, [k1, p1] twice.
• Row 23: (K1, yo, k1) in next st, p1, [k1, p1] 8 times, sl1-k2tog-psso, p1, k1, p1.
• Row 25: (K1, yo, k1) in next st, p1, k1, p1, k3tog, p1, 1-to-9 inc, p1, [k1, p1] 4 times, k3tog, p1, 1-to-9 inc, p1 (38 sts).
• Row 27: (K1, yo, k1) in next st, p1, k1, p1, k3tog, p1, [k1, p1] 5 times, [k1, p1] 3 times, k3tog, p1, [k1, p1] 5 times (36 sts).
• Row 29: (K1, yo, k1) in next st, p1, [k1, p1] 3 times, [k1, p1] 5 times, [k1, p1] twice, k3tog, p1, [k1, p1] 5 times.
• Row 31: (K1, yo, k1) in next st, p1, [k1, p1] 4 times, [k1, p1] 5 times, k1, p1, k3tog, p1, [k1, p1] 5 times.
• Row 33: (K1, yo, k1) in next st, p1, [k1, p1] 3 times, [1-to-9 inc, p1, sl1-k2tog-psso, p1, [k1, p1] 4 times] twice (50 sts).
• Row 35: (K1, yo, k1) in next st, p1, [k1, p1] 4 times, [[k1, p1] 5 times, sl1-k2tog-psso, p1, [k1, p1] 3 times] twice (48 sts).
• Row 37: (K1, yo, k1) in next st, p1, [k1, p1] 5 times, [[k1, p1] 5 times, sl1-k2tog-psso, p1, [k1, p1] twice] twice (46 sts).
• Row 39: (K1, yo, k1) in next st, p1, [k1, p1] 6 times, [[k1, p1] 5 times, sl1-k2tog-psso, p1, k1, p1] twice (44 sts).
• Row 41: (K1, yo, k1) in next st, p1, [k1, p1] 6 times, 1-to-9 inc, p1, [k3tog, p1, [k1, p1] 4 times, 1-to-9 inc, p1] twice (66 sts).