Shown with a cast-on count of 1 stitch.  

• Round 1: Ctr dbl inc (3 sts).
• Rounds 2, 4, 6, 8, 10, 12, and 14: Knit.
• Round 3: K1, ctr dbl inc, k1 (5 sts).
• Round 5: K2, yo, ctr dbl inc, yo, k2 (9 sts).
• Round 7: K3, yo, k3, yo, k3 (11 sts).
• Round 9: K1, sl1-k2tog-psso, k3, sl1-k2tog-psso, k1 (7 sts).
• Round 11: Ssk, k3, p2tog (5 sts).
• Round 13: Ssk, k1, p2tog (3 sts).
• Round 15: Sl1-k2tog-psso (1 st).