Shown with a cast-on count of 4 stitches.  

• Row 1 (WS): P4.
• Row 2: K1, yo, knit (5 sts).
• Row 3: P5.
• Row 4: K1, yo, k1, yo, knit (7 sts).
• Rows 5, 7, 9, 11, 13, 15, and 17: Purl.
• Row 6: K1, yo, k2, yo, knit (9 sts).
• Row 8: K1, yo, k3, yo, knit to last 2 sts, k2tog (10 sts).
• Row 10: K1, yo, k4, yo, knit (12 sts).
• Row 12: K1, yo, k5, yo, knit to last 2 sts, k2tog (13 sts).
• Row 14: K1, yo, k6, yo, knit (15 sts).
• Row 16: K1, yo, k7, yo, knit to last 2 sts, k2tog (16 sts).
• Row 18: K1, yo, k8, yo, knit (18 sts).