Shown with a cast-on count of 48 stitches.  

• Rows 1, 3, 5, 7, 9, 11, 13, and 15 (RS): *BrSl, k1, repeat from *.
• Row 2: K1, brSl, (k1, yo, k1) in next st, [brSl, k1] 3 times, brSl, k5tog, [brSl, k1] 3 times, brSl, (k1, yo, k1) in next st, brSl, k1, brSl, (k1, yo, k1) in next st, [brSl, k1] 3 times, brSl, k5tog, [brSl, k1] 3 times, brSl, (k1, yo, k1) in next st, brSl.
• Row 4: K1, brSl, k1, brSl, (k1, yo, k1) in next st, [brSl, k1] twice, brSl, k5tog, [brSl, k1] twice, brSl, (k1, yo, k1) in next st, brSl, k1, brSl, k1, brSl, k1, brSl, (k1, yo, k1) in next st, [brSl, k1] twice, brSl, k5tog, [brSl, k1] twice, brSl, (k1, yo, k1) in next st, brSl, k1, brSl.
• Row 6: [K1, brSl] 3 times, (k1, yo, k1) in next st, brSl, k1, brSl, k5tog, brSl, k1, brSl, (k1, yo, k1) in next st, [brSl, k1] twice, brSl, [k1, brSl] 3 times, (k1, yo, k1) in next st, brSl, k1, brSl, k5tog, brSl, k1, brSl, (k1, yo, k1) in next st, [brSl, k1] twice, brSl.
• Row 8: K1, [brSl, k1] 4 times, brSl, k5tog, [brSl, k1] 4 times, brSl, k1, [brSl, k1] 4 times, brSl, k5tog, [brSl, k1] 4 times, brSl (40 sts).
• Rows 10, 14, and 16: *K1, brSl, repeat from *.
• Row 12: K1, [brSl, k1] 4 times, brSl, 1-to-5 inc, brSl, k1, [brSl, k1] 3 times, brSl, k1, [brSl, k1] 4 times, brSl, 1-to-5 inc, brSl, k1, [brSl, k1] 3 times, brSl (48 sts).