Shown with a cast-on count of 2 stitches.  

• Rounds 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, and 40: Knit.
• Round 5: Yo, kfb, kfb, yo (6 sts).
• Round 7: Kfb, kfb, 2-to-2 gather, kfb, kfb (10 sts).
• Round 9: Kfb, M1L, k1, kfb, [2-to-2 gather] twice, kfb, k1, M1L, kfb (16 sts).
• Round 11: Kfb, 2-to-2 gather, kfb, kfb, [2-to-2 gather] 3 times, kfb, kfb, 2-to-2 gather, kfb (22 sts).
• Round 13: Kfb, [2-to-2 gather] twice, kfb, kfb, [2-to-2 gather] 4 times, kfb, kfb, [2-to-2 gather] twice, kfb (28 sts).
• Round 15: Kfb, [2-to-2 gather] 3 times, k1 tbl, k1 tbl, [2-to-2 gather] 5 times, k1 tbl, k1 tbl, [2-to-2 gather] 3 times, kfb (30 sts).
• Rounds 17 and 21: K1 tbl, [2-to-2 gather] 14 times, k1 tbl.
• Round 19: [2-To-2 gather] 4 times, k1 tbl, k1 tbl, [2-to-2 gather] 5 times, k1 tbl, k1 tbl, [2-to-2 gather] 4 times.
• Round 23: Ssk, [2-to-2 gather] 3 times, kfb, k1, ssk, [2-to-2 gather] 3 times, k2tog, k1, kfb, [2-to-2 gather] 3 times, k2tog (28 sts).
• Round 25: Ssk, [2-to-2 gather] twice, k4, ssk, [2-to-2 gather] twice, k2tog, k4, [2-to-2 gather] twice, k2tog (24 sts).
• Round 27: Ssk, 2-to-2 gather, k5, ssk, 2-to-2 gather, k2tog, k5, 2-to-2 gather, k2tog (20 sts).
• Round 29: Ssk, k1 tbl, yo, ssk, k1, k2tog, yo, ssk, k2tog, yo, ssk, k1, k2tog, yo, k1 tbl, k2tog (16 sts).
• Round 31: Yo, ssk, yo, k1, yo, k3tog, yo, k1, yo, k2tog, yo, k1, yo, k3tog, yo, k1, yo, k2tog, yo (19 sts).
• Round 33: K1, yo, k1, yo, k3tog, yo, k1, yo, k3tog, yo, k1, yo, k3tog, yo, k1, yo, k3tog, yo, k1, yo, knit (21 sts).