Shown with a cast-on count of 44 stitches.  

• Row 1 (RS): K3, k2tog, k3, [yo, k2tog] twice, yo, k21, [yo, ssk] twice, yo, k3, ssk, k2.
• Rows 2, 4, 6, 8, 10, 12, 14, and 16: Purl.
• Row 3: K2, k2tog, k3, yo, k1, [yo, ssk] twice, yo, k3, ssk, k11, k2tog, k3, [yo, k2tog] twice, yo, k1, yo, k3, ssk, k1.
• Row 5: K1, k2tog, k3, yo, k3, [yo, ssk] twice, yo, k3, ssk, k9, k2tog, k3, [yo, k2tog] twice, yo, k3, yo, k3, ssk.
• Row 7: Sl2-k1-p2sso, k3, yo, k5, [yo, ssk] twice, yo, k3, ssk, k7, k2tog, k3, [yo, k2tog] twice, yo, k5, yo, k3.
• Row 9: K11, [yo, ssk] twice, yo, k3, ssk, k5, k2tog, k3, [yo, k2tog] twice, yo, k10.
• Row 11: K6, k2tog, k3, [yo, k2tog] twice, yo, k1, yo, k3, ssk, k3, k2tog, k3, yo, k1, [yo, ssk] twice, yo, k3, ssk, k5.
• Row 13: K5, k2tog, k3, [yo, k2tog] twice, yo, k3, yo, k3, ssk, k1, k2tog, k3, yo, k3, [yo, ssk] twice, yo, k3, ssk, k4.
• Row 15: K4, k2tog, k3, [yo, k2tog] twice, yo, k5, yo, k3, sl2-k1-p2sso, k3, yo, k5, [yo, ssk] twice, yo, k3, ssk, k3.