Shown with a cast-on count of 20 stitches.  

• Round 1: *P1, k4, k2tog, k2, incR, k1, repeat from *.
• Rounds 2, 4, 6, 8, and 10-11: *P1, k9, repeat from *.
• Round 3: *P1, k3, k2tog, k2, incR, k2, repeat from *.
• Round 5: *P1, k2, k2tog, k2, incR, k3, repeat from *.
• Round 7: *P1, k1, k2tog, k2, incR, k4, repeat from *.
• Round 9: *P1, k2tog, k2, incR, k5, repeat from *.