Shown with a cast-on count of 21 stitches.  

• Row 1 (RS): K7, p7, k7.
• Rows 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, and 36: Purl.
• Row 3: K6, k2tog, yo, k5, yo, ssk, k6.
• Row 5: K5, k2tog, yo, k1 tbl, k5, k1 tbl, yo, ssk, k5.
• Row 7: K4, k2tog, yo, k1 tbl, k7, k1 tbl, yo, ssk, k4.
• Row 9: K3, k2tog, yo, k1 tbl, k9, k1 tbl, yo, ssk, k3.
• Row 11: K2, k2tog, yo, k1 tbl, k11, k1 tbl, yo, ssk, k2.
• Row 13: K1, incR, k1, yo, sl1-k2tog-psso, k11, k3tog, yo, k1, incL, k1.
• Row 15: K3, incR, k1 tbl, yo, sl1-k2tog-psso, k7, k3tog, yo, k1 tbl, incL, k3.
• Row 17: K5, incR, k1 tbl, yo, sl1-k2tog-psso, k3, k3tog, yo, k1 tbl, incL, k5.
• Row 19: K7, incR, k1 tbl, yo, k5tog, yo, k1 tbl, incL, k7.
• Row 21: K6, incR, k1, k3tog, (k1, yo, k1) in next st, sl1-k2tog-psso, k1, incL, k6.
• Row 23: K6, k3tog, yo, k1, incL, k1, incR, k1, yo, sl1-k2tog-psso, k6.
• Row 25: K4, k3tog, yo, k1 tbl, incR, k5, incL, k1 tbl, yo, sl1-k2tog-psso, k4.
• Row 27: K2, k3tog, yo, k1 tbl, incR, k9, incL, k1 tbl, yo, sl1-k2tog-psso, k2.
• Row 29: K2, yo, ssk, k13, k2tog, yo, k2.
• Row 31: K2, k1 tbl, yo, ssk, k11, k2tog, yo, k1 tbl, k2.
• Row 33: K3, k1 tbl, yo, ssk, k9, k2tog, yo, k1 tbl, k3.
• Row 35: K4, k1 tbl, yo, ssk, k7, k2tog, yo, k1 tbl, k4.
• Row 37: K5, k1 tbl, yo, ssk, p5, k2tog, yo, k1 tbl, k5.
• Row 38: P7, k7, p7.