Shown with a cast-on count of 10 stitches.  

• Row 0 (RS): K10.
• Row 1: P3, p4, p3.
• Row 2: K3, incL, k4, incR, k3 (12 sts).
• Row 3: P4, incLp, purl to last 4 sts, incRp, p4 (14 sts).
• Row 4: K5, incL, knit to last 5 sts, incR, k5 (16 sts).
• Row 5: P6, incLp, purl to last 6 sts, incRp, p6 (18 sts).
• Row 6: K7, incR, knit to last 7 sts, incL, k7 (20 sts).
• Row 7: P8, incRp, purl to last 8 sts, incLp, p8 (22 sts).
• Row 8: K9, incR, knit to last 9 sts, incL, k9 (24 sts).
• Row 9: P10, incRp, purl to last 10 sts, incLp, p10 (26 sts).