Shown with a cast-on count of 1 stitch.  

• Round 1: 1-To-6 inc (6 sts).
• Round 2: *(K1, p1) in next st, repeat from * (12 sts).
• Rounds 3, 7, 11, 15, and 19: *K1, p1, repeat from *.
• Round 4: *K1, (p1, k1) in next st, repeat from * (18 sts).
• Round 5: *K1, p1, k1, repeat from *.
• Round 6: *K1, p1, (k1, p1) in next st, repeat from * (24 sts).
• Round 8: *K1, p1, k1, (p1, k1) in next st, repeat from * (30 sts).
• Round 9: *K1, p1, k1, p1, k1, repeat from *.
• Round 10: *K1, p1, k1, p1, (k1, p1) in next st, repeat from * (36 sts).
• Round 12: *[K1, p1] twice, k1, (p1, k1) in next st, repeat from * (42 sts).
• Round 13: *[K1, p1] 3 times, k1, repeat from *.
• Round 14: *[K1, p1] 3 times, (k1, p1) in next st, repeat from * (48 sts).
• Round 16: *[K1, p1] 3 times, k1, (p1, k1) in next st, repeat from * (54 sts).
• Round 17: *[K1, p1] 4 times, k1, repeat from *.
• Round 18: *[K1, p1] 4 times, (k1, p1) in next st, repeat from * (60 sts).