Shown with a cast-on count of 23 stitches.  

• Row 1 (WS): Knit.
• Rows 2 and 4: K1, p1, [k3, p1] 5 times, k1.
• Row 3: K2, [p3, k1] 5 times, k1.
• Row 5: Kfb, yo, k1, [ssk, p1, k1] 5 times, yo, kfb (22 sts).
• Row 6: K3, p1, [k2, p1] 5 times, k3.
• Row 7: K4, ssk, k1, ssk, k4, ssk, k1, ssk, k4 (18 sts).
• Row 8: K1, yo, k1, yo, k1, p1, k1, p1, k1, p1, k2, p1, k1, p1, k1, p1, k1, yo, k1, yo, k1 (22 sts).
• Row 9: K6, [k2tog] 5 times, k6 (17 sts).
• Row 10: K1, yo, k1, kfb, k1, yo, k1, p1, k5, p1, k1, yo, k1, kfb, k1, yo, k1 (23 sts).
• Row 11: K2tog, k6, p7, k6, k2tog (21 sts).
• Row 12: K1, yo, k2tog, k1, k2tog, yo, k1, p1, kfb, p1, kfb, p1, kfb, p1, k1, yo, k2tog, k1, k2tog, yo, k1 (24 sts).
• Row 13: K9, kfb, k4, kfb, k9 (26 sts).