Shown with a cast-on count of 3 stitches.  

• Row 1 (RS): *K1, yo, repeat from * (multiple of 2 sts).
• Rows 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, and 28: Purl.
• Row 3: *K1, yo, k1, repeat from * (multiple of 3 sts).
• Row 5: *[K1, yo] twice, k1, repeat from * (multiple of 5 sts).
• Row 7: *[K1, yo] 4 times, k1, repeat from * (multiple of 9 sts).
• Row 9: *K2, [k1, yo] 4 times, k3, repeat from * (multiple of 13 sts).
• Row 11: *K4, [k1, yo] 4 times, k5, repeat from * (multiple of 17 sts).
• Row 13: *Yo, ssk, k13, k2tog, repeat from *, yo (multiple of 16 sts, plus 1).
• Row 15: *K1, yo, ssk, k11, k2tog, yo, repeat from * to last st, k1.
• Row 17: *K2, yo, ssk, k9, k2tog, yo, k1, repeat from * to last st, k1.
• Row 19: Ssk, *yo, k1, yo, ssk, k7, k2tog, yo, k1, yo, sl2-k1-p2sso, repeat from * to last 15 sts, yo, k1, yo, ssk, k7, k2tog, yo, k1, yo, k2tog.
• Row 21: Kfb, *yo, k1, yo, ssk, yo, ssk, k5, [k2tog, yo] twice, k1, yo, (k1, p1, k1) in next st, repeat from * to last 16 sts, yo, k1, yo, ssk, yo, ssk, k5, [k2tog, yo] twice, k1, yo, kfb (multiple of 20 sts, plus 21).
• Row 23: *K1, [yo, ssk] 4 times, k3, [k2tog, yo] 4 times, repeat from * to last st, k1.
• Row 25: *K2, [yo, ssk] 4 times, k1, [k2tog, yo] 4 times, k1, repeat from * to last st, k1.
• Row 27: *K3, [yo, ssk] 3 times, yo, sl2-k1-p2sso, [yo, k2tog] 3 times, yo, k2, repeat from * to last st, k1.