Shown with a cast-on count of 3 stitches.  

• Row 1 (RS): K1, yo, k1, yo, k1 (5 sts).
• Row 2: P5.
• Row 3: K1, yo, k2tog, k1, yo, k1 (6 sts).
• Row 4: P6.
• Row 5: K1, yo, k2tog, k2, yo, k1 (7 sts).
• Row 6: P7.
• Row 7: K1, yo, k2tog, k3, yo, k1 (8 sts).
• Row 8: P8.
• Row 9: K1, yo, k2tog, k4, yo, k1 (9 sts).
• Rows 10, 12, 14, and 16: P9.
• Rows 11, 13, and 15: K1, yo, k2tog, k3, ssk, yo, k1.
• Row 17: K1, yo, k5, ssk, yo, k1 (10 sts).
• Row 18: P10.