Shown with a cast-on count of 259 stitches.  

• Row 1 (RS): K2, yo, k12, k2tog, [k6, [kfb] twice, k6, [k2tog] twice] 5 times, k6, [kfb] twice, k6, k2tog, k6, [kfb] twice, k6, k2tog, [k6, [kfb] twice, k6, [k2tog] twice] 5 times, k6, [kfb] twice, k6, k2tog, k13, yo, k2 (263 sts).
• Row 2: K2, yo, purl to last 2 sts, yo, k2 (265 sts).
• Row 3: K2, yo, knit to last 2 sts, yo, k2 (267 sts).
• Row 4: K2, yo, purl to last 2 sts, yo, k2 (269 sts).
• Row 5: K2, yo, k7, [kfb] twice, [k3, [k2tog] 4 times, k3, [kfb] 4 times] 6 times, k3, [k2tog] twice, k7, [kfb] twice, k7, [k2tog] twice, [k3, [kfb] 4 times, k3, [k2tog] 4 times] 6 times, k3, [kfb] twice, k8, yo, k2 (273 sts).
• Row 6: K2, yo, purl to last 2 sts, yo, k2 (275 sts).
• Row 7: K2, yo, knit to last 2 sts, yo, k2 (277 sts).
• Row 8: K2, yo, purl to last 2 sts, yo, k2 (279 sts).
• Row 9: K2, yo, k2, [k2tog] 3 times, [[kfb] 6 times, [k2tog] 6 times] 14 times, [kfb] 6 times, [k2tog] 3 times, k3, yo, k2 (281 sts).
• Row 10: K2, yo, purl to last 2 sts, yo, k2 (283 sts).
• Row 11: K2, yo, kfb, knit to last 3 sts, kfb, yo, k2 (287 sts).
• Row 12: K2, yo, purl to last 2 sts, yo, k2 (289 sts).