Shown with a cast-on count of 41 stitches.  

• Row 1 (RS): K1, ctr dbl inc, *[k2tog] twice, yo, k1, yo, k1, yo, k1, yo, [ssk] twice, repeat from * to last 6 sts, k3, ssk, k1 (multiple of 11 sts, plus 9).
• Rows 2, 4, 6, 10, and 12: K3, purl to last 3 sts, k3.
• Row 3: K1, ctr dbl inc, k2, *[k2tog] twice, yo, k1, yo, k1, yo, k1, yo, [ssk] twice, repeat from * to last 5 sts, k2, ssk, k1 (multiple of 11 sts, plus 10).
• Row 5: K1, ctr dbl inc, k4, *[k2tog] twice, yo, k1, yo, k1, yo, k1, yo, [ssk] twice, repeat from * to last 4 sts, k1, ssk, k1 (multiple of 11 sts, plus 11).
• Rows 7, 13, and 15: K1, ctr dbl inc, knit to last 3 sts, ssk, k1 (1 more st).
• Rows 8, 14, and 16: Knit.
• Row 9: K1, ctr dbl inc, k8, *[k2tog] twice, yo, k1, yo, k1, yo, k1, yo, [ssk] twice, repeat from * to last 13 sts, k10, ssk, k1 (multiple of 11 sts, plus 24).
• Row 11: K1, ctr dbl inc, k10, *[k2tog] twice, yo, k1, yo, k1, yo, k1, yo, [ssk] twice, repeat from * to last 12 sts, k9, ssk, k1 (multiple of 11 sts, plus 25).