Shown with a cast-on count of 2 stitches.  

• Round 1: K2.
• Round 2: [Yo, k1] twice (4 sts).
• Round 3: K4.
• Round 4: [Yo, k2] twice (6 sts).
• Round 5: K6.
• Round 6: [Yo, k3] twice (8 sts).
• Round 7: K8.
• Round 8: [Yo, k4] twice (10 sts).
• Round 9: K10.
• Round 10: [Yo, k5] twice (12 sts).
• Round 11: K12.
• Round 12: [Yo, k6] twice (14 sts).
• Round 13: K14.
• Round 14: [Yo, k7] twice (16 sts).
• Round 15: K16.
• Round 16: [Yo, k8] twice (18 sts).
• Round 17: K18.
• Round 18: [Yo, k9] twice (20 sts).
• Round 19: K20.
• Round 20: [Yo, k10] twice (22 sts).
• Round 21: K22.
• Round 23: [Yo, ssk, k8, yo, k1] twice (24 sts).
• Round 24: K24.
• Round 25: [Yo, ssk, k7, yo, k1, yo, ssk] twice (26 sts).
• Round 26: K26.
• Round 27: [Yo, ssk, k6, yo, k1, yo, ssk, yo, ssk] twice (28 sts).
• Round 28: K28.
• Round 29: [Yo, ssk, k5, yo, k1, yo, ssk, yo, ssk, yo, ssk] twice (30 sts).
• Round 30: K30.
• Round 31: [Yo, ssk, k4, yo, k1, yo, ssk, yo, ssk, yo, ssk, yo, ssk] twice (32 sts).
• Round 32: K32.
• Round 33: [Yo, ssk, k3, yo, k1, yo, ssk, yo, ssk, yo, ssk, yo, ssk, yo, ssk] twice (34 sts).
• Round 34: K34.
• Round 35: [Yo, ssk, k2, yo, k1, yo, ssk, yo, ssk, yo, ssk, yo, ssk, yo, ssk, yo, ssk] twice (36 sts).
• Round 36: K36.
• Round 37: [Yo, ssk, k1, yo, k1, yo, ssk, yo, ssk, yo, ssk, yo, ssk, yo, ssk, yo, ssk, yo, ssk] twice (38 sts).
• Round 38: K38.
• Round 39: [Yo, ssk, yo, k1, yo, ssk, yo, ssk, yo, ssk, yo, ssk, yo, ssk, yo, ssk, yo, ssk, yo, ssk] twice (40 sts).
• Round 40: K40.
• Rounds 41 and 43: Purl.
• Rounds 42 and 44: Knit.