Shown with a cast-on count of 36 stitches.  

• Rows 1, 3, 5, 7, 9, 11, and 13 (RS): K18, p18.
• Rows 2, 4, 8, and 12: P18, k18.
• Rows 6 and 10: P2, p2tog, p4, M1L, p1, p1, M1L, p4, ssp, p2, k2, k2tog, k4, M1L, k1, k1, M1L, k4, ssk, k2.
• Row 14: P2, p2tog, p5, yo, yo, yo, p5, p2tog, p2, k2, k2tog, k5, yo, yo, yo, k5, ssk, k2 (38 sts).
• Row 15: K8, 1-to-4 inc, (k1, p1, k1) in next st, 1-to-4 inc, k8, p8, 1-to-4 inc, (p1, k1, p1) in next st, 1-to-4 inc, p8 (54 sts).
• Row 16: P27, k27.
• Row 17: K27, p27.
• Row 18: BO (0 sts).