Shown with a cast-on count of 22 stitches.  

• Round 1: [P1, k1] 9 times, yo, [p1, k1] twice (23 sts).
• Round 2: [P1, k1] 9 times, k1, [p1, k1] twice.
• Round 3: [P1, k1] 9 times, yo, k1, [p1, k1] twice (24 sts).
• Round 4: [P1, k1] 9 times, p1, k1, [p1, k1] twice.
• Round 5: [P1, k1] 9 times, yo, [p1, k1] 3 times (25 sts).
• Round 6: [P1, k1] 9 times, k1, [p1, k1] 3 times.
• Round 7: [P1, k1] 9 times, yo, k1, [p1, k1] 3 times (26 sts).
• Round 8: [P1, k1] 9 times, p1, k1, [p1, k1] 3 times.
• Round 9: [P1, k1] 9 times, yo, [p1, k1] 4 times (27 sts).
• Round 10: [P1, k1] 9 times, k1, [p1, k1] 4 times.
• Round 11: [P1, k1] 3 times, [p2tog] 6 times, yo, k1, [p1, k1] 4 times (22 sts).
• Rounds 12 and 24: [P1, k1] 11 times.
• Round 13: [P1, k1] twice, yo, [p1, k1] 9 times (23 sts).
• Round 14: [P1, k1] twice, p1, [p1, k1] 9 times.
• Round 15: [P1, k1] twice, p1, yo, [p1, k1] 9 times (24 sts).
• Round 16: [P1, k1] twice, p1, k1, [p1, k1] 9 times.
• Round 17: [P1, k1] 3 times, yo, [p1, k1] 9 times (25 sts).
• Round 18: [P1, k1] 3 times, p1, [p1, k1] 9 times.
• Round 19: [P1, k1] 3 times, p1, yo, [p1, k1] 9 times (26 sts).
• Round 20: [P1, k1] 3 times, p1, k1, [p1, k1] 9 times.
• Round 21: [P1, k1] 4 times, yo, [p1, k1] 9 times (27 sts).
• Round 22: [P1, k1] 4 times, p1, [p1, k1] 9 times.
• Round 23: [P1, k1] 4 times, p1, yo, [p2tog] 6 times, [p1, k1] 3 times (22 sts).