Shown with a cast-on count of 31 stitches.  

• Rows 0, 2, 4, 6, 8, 10, 12, and 14 (RS): K1, [brSl, k1] 15 times.
• Rows 1 and 9: BrSl, k3tog, brSl, k3tog, brSl, k1, brSl, ctr dbl inc, brSl, ctr dbl inc, brSl, k3tog, brSl, k3tog, brSl, k1, brSl, ctr dbl inc, brSl, ctr dbl inc, brSl, k1, brSl.
• Rows 3 and 11: BrSl, k3tog, brSl, k1, brSl, ctr dbl inc, [brSl, k1] 4 times, brSl, ctr dbl inc, [brSl, k1] 3 times, brSl, k1, brSl, k3tog, brSl.
• Rows 5 and 13: BrSl, k1, brSl, ctr dbl inc, brSl, ctr dbl inc, brSl, k1, brSl, k3tog, brSl, k3tog, brSl, ctr dbl inc, brSl, ctr dbl inc, brSl, k1, brSl, k3tog, brSl, k3tog, brSl.
• Rows 7 and 15: BrSl, k1, brSl, k3tog, [brSl, k1] 3 times, brSl, ctr dbl inc, [brSl, k1] 4 times, brSl, ctr dbl inc, brSl, k1, brSl, k3tog, brSl.