Shown with a cast-on count of 19 stitches.  

• Round 1: *K1, brSl, repeat from * to last 5 sts, k1, brSl, (k1, yo, k1) in next st, brSl, k1 (multiple of 2 sts, plus 7).
• Round 2: BrSl, p1, *brSl, sssp, brSl, p1, repeat from * to last 7 sts, [brSl, p1] 3 times, brSl (multiple of 4 sts, plus 9).
• Round 3: *(K1, yo, k1) in next st, brSl, k1, brSl, repeat from * to last 5 sts, k1, brSl, k1, brSl, k1 (multiple of 6 sts, plus 5).
• Round 4: *BrSl, p1, repeat from * to last 7 sts, brSl, p1, brSl, (p1, yo, p1) in next st, brSl, p1, brSl (multiple of 2 sts, plus 9).
• Rounds 5 and 9: *K1, brSl, repeat from * to last st, k1.
• Rounds 6, 8, 12, and 14: *BrSl, p1, repeat from * to last st, brSl.
• Round 7: *K1, brSl, repeat from * to last 9 sts, [k1, brSl] twice, (k1, yo, k1) in next st, [brSl, k1] twice (multiple of 2 sts, plus 11).
• Round 10: *BrSl, p1, brSl, p3tog, repeat from * to last 15 sts, [brSl, p1] 4 times, brSl, (p1, yo, p1) in next st, brSl, [p1, brSl] twice.
• Round 11: K1, brSl, *(k1, yo, k1) in next st, brSl, k1, brSl, repeat from * to last 15 sts, [k1, brSl] 7 times, k1 (multiple of 6 sts, plus 17).
• Round 13: *K1, brSl, repeat from * to last 15 sts, [k1, brSl] 4 times, (k1, yo, k1) in next st, [brSl, k1] twice, brSl, k1 (multiple of 2 sts, plus 17).
• Round 15: *K1, brSl, repeat from * to last 15 sts, k1, BO 13 sts (multiple of 2 sts, plus 2).