Shown with a cast-on count of 1 stitch.  

• Row 1 (RS): Yo, k1 (2 sts).
• Row 2: Yo, k2 (3 sts).
• Row 3: Yo, k1, yo, k1, yo, k1 (6 sts).
• Row 4: Yo, k1, p3, k2 (7 sts).
• Row 5: Yo, k3, yo, k1, yo, k3 (10 sts).
• Row 6: Yo, k2, p5, k3 (11 sts).
• Row 7: Yo, k5, yo, k1, yo, k5 (14 sts).
• Row 8: Yo, k3, p7, k4 (15 sts).
• Row 9: Yo, k7, yo, k1, yo, k7 (18 sts).
• Row 10: Yo, k4, p9, k5 (19 sts).
• Row 11: Yo, k9, yo, k1, yo, k9 (22 sts).
• Row 12: Yo, k5, p11, k6 (23 sts).
• Row 13: Yo, k11, yo, k1, yo, k11 (26 sts).
• Row 14: Yo, k6, p13, k7 (27 sts).
• Row 15: Yo, k13, yo, k1, yo, k13 (30 sts).
• Row 16: Yo, k7, p15, k8 (31 sts).
• Row 17: Yo, k8, ssk, k11, k2tog, k8 (30 sts).
• Row 18: Yo, k8, p13, k9 (31 sts).
• Row 19: Yo, k9, ssk, k9, k2tog, k9 (30 sts).
• Row 20: Yo, k9, p11, k10 (31 sts).
• Row 21: Yo, k10, ssk, k7, k2tog, k10 (30 sts).
• Row 22: Yo, k10, p9, k11 (31 sts).
• Row 23: Yo, k11, ssk, k5, k2tog, k11 (30 sts).
• Row 24: Yo, k11, p7, k12 (31 sts).
• Row 25: Yo, k12, ssk, k3, k2tog, k12 (30 sts).
• Row 26: Yo, k12, p5, k13 (31 sts).
• Row 27: Yo, k13, ssk, k1, k2tog, k13 (30 sts).
• Row 28: Yo, k13, p3, k14 (31 sts).
• Row 29: Yo, k14, ssk, k15.
• Row 30: Yo, k14, p2, k15 (32 sts).
• Row 31: Yo, k15, ssk, k15.
• Row 32: K32.
• Round 33: Yo, k2tog, yo, k2tog, yo, k2tog, yo, k2tog, yo, k2tog, yo, k2tog, yo, k2tog, yo, k2tog, yo, k2tog, yo, k2tog, yo, k2tog, yo, k2tog, yo, k2tog, yo, k2tog, yo, k2tog, yo, k1, yo, k1 (34 sts).
• Round 34: K34.
• Round 35: Yo, ssk, yo, k4, ssk, yo, k4, ssk, yo, k4, ssk, yo, k4, ssk, yo, k4, ssk, yo, k1, yo, k1 (36 sts).
• Round 36: K36.
• Round 37: Yo, ssk, yo, k1, yo, k2tog, k1, ssk, yo, k1, yo, k2tog, k1, ssk, yo, k1, yo, k2tog, k1, ssk, yo, k1, yo, k2tog, k1, ssk, yo, k1, yo, k2tog, k1, ssk, yo, k1, yo, k2tog, yo, k1 (38 sts).
• Round 38: K38.
• Round 39: Yo, ssk, yo, k3, yo, k3tog, yo, k3, yo, k3tog, yo, k3, yo, k3tog, yo, k3, yo, k3tog, yo, k3, yo, k3tog, yo, k3, yo, k2tog, yo, k1 (40 sts).
• Round 40: K40.
• Round 41: Yo, k2, yo, k2tog, k1, ssk, yo, k1, yo, k2tog, k1, ssk, yo, k1, yo, k2tog, k1, ssk, yo, k1, yo, k2tog, k1, ssk, yo, k1, yo, k2tog, k1, ssk, yo, k1, yo, k2tog, k1, ssk, yo, k2, yo, k1 (42 sts).
• Round 42: K42.
• Round 43: Yo, k4, yo, k3tog, yo, k3, yo, k3tog, yo, k3, yo, k3tog, yo, k3, yo, k3tog, yo, k3, yo, k3tog, yo, k3, yo, k3tog, yo, k4, yo, k1 (44 sts).
• Round 44: K44.
• Round 45: Yo, k43, yo, k1 (46 sts).