Shown with a cast-on count of 13 stitches.  

• Rows 1 and 17 (RS): Knit.
• Row 2: K3, p7, k3.
• Rows 3 and 9: K5, incL, k3, incR, k5 (15 sts).
• Rows 4, 10, 14, and 18: K3, p9, k3.
• Row 5: K5, yo, k5, yo, k5 (17 sts).
• Row 6: K3, p3, drop st, p3, drop st, p3, k3 (15 sts).
• Rows 7 and 19: K4, ssk, k3, k2tog, k4 (13 sts).
• Row 8: Purl.
• Row 11: K5, yo, k4, yo, k6 (17 sts).
• Row 12: K3, p2, [drop st] twice, p3, [drop st] twice, p2, k3 (13 sts).
• Row 13: K4, incL, k5, incR, k4 (15 sts).
• Row 15: K4, yo, k7, yo, k4 (17 sts).
• Row 16: K3, p2, drop st, p5, drop st, p2, k3 (15 sts).