Shown with a cast-on count of 10 stitches.  

• Row 1 (RS): K2, [[yo] twice, k2tog] twice, yo, k2tog, k2 (12 sts).
• Row 2: K3, yo, k2tog, k1, p1, k2, p1, k2.
• Row 3: K2, [[yo] twice, k2tog] twice, k2, yo, k2tog, k2 (14 sts).
• Row 4: K3, yo, k2tog, k3, p1, k2, p1, k2.
• Row 5: K2, [[yo] twice, k2tog] twice, k4, yo, k2tog, k2 (16 sts).
• Row 6: K3, yo, k2tog, k5, p1, k2, p1, k2.
• Row 7: K2, [[yo] twice, k2tog] twice, k6, yo, k2tog, k2 (18 sts).
• Row 8: K3, yo, k2tog, k7, p1, k2, p1, k2.
• Row 9: K2, [[yo] twice, k2tog] twice, k8, yo, k2tog, k2 (20 sts).
• Row 10: K3, yo, k2tog, k9, p1, k2, p1, k2.
• Row 11: K2, [[yo] twice, k2tog] twice, k10, yo, k2tog, k2 (22 sts).
• Row 12: K3, yo, k2tog, k11, p1, k2, p1, k2.
• Row 13: K2, [[yo] twice, k2tog] twice, k12, yo, k2tog, k2 (24 sts).
• Row 14: K3, yo, k2tog, k13, p1, k2, p1, k2.
• Row 15: K2, [[yo] twice, k2tog] twice, k14, yo, k2tog, k2 (26 sts).
• Row 16: K3, yo, k2tog, k15, p1, k2, p1, k2.
• Row 17: BO 16 sts, k1, [[yo] twice, k2tog] twice, yo, k2tog, k2 (12 sts).
• Repeat rows 2-17.