Shown with a cast-on count of 8 stitches.  

• Row 1 (RS): K5, [yo, k1] twice, k1 (10 sts).
• Row 2: P6, M1L, k4 (11 sts).
• Row 3: K4, p1, k2, [yo, k1] twice, k2 (13 sts).
• Row 4: P8, M1L, k5 (14 sts).
• Row 5: K4, p2, k2, [k1, yo] twice, k4 (16 sts).
• Row 6: P10, M1L, k6 (17 sts).
• Row 7: K4, p3, k4, yo, k1, yo, k5 (19 sts).
• Row 8: P12, M1L, k7 (20 sts).
• Row 9: K4, p4, ssk, k7, k2tog, k1 (18 sts).
• Row 10: P10, M1L, k8 (19 sts).
• Row 11: K4, p5, ssk, k5, k2tog, k1 (17 sts).
• Row 12: P8, M1L, k2, p1, k6 (18 sts).
• Row 13: K4, p1, k1, p4, ssk, k3, k2tog, k1 (16 sts).
• Row 14: P6, M1L, k4, p1, k5 (17 sts).
• Row 15: K4, p1, k1, p5, ssk, k1, k2tog, k1 (15 sts).
• Row 16: P4, M1L, k5, p1, k5 (16 sts).
• Row 17: K4, p1, k1, p6, sl1-k2tog-psso, k1 (14 sts).
• Row 18: P2tog, p5tog, p3, k4 (9 sts).