Shown with a cast-on count of 24 stitches.  

• Row 1 (RS): P1, k1, *k1, [yo, ssk] twice, k3, k2tog, yo, repeat from * to last 2 sts, k1, p1.
• Rows 2, 4, 6, 8, 12, 14, 16, and 18: Purl.
• Row 3: P1, k1, *k2, [yo, ssk] twice, k2, k2tog, yo, repeat from * to last 2 sts, k1, p1.
• Row 5: P1, k1, *k3, [yo, ssk] twice, k1, k2tog, yo, repeat from * to last 2 sts, k1, p1.
• Row 7: P1, k1, *k4, [yo, ssk] twice, k2tog, yo, repeat from * to last 2 sts, k1, p1.
• Row 11: P1, k1, *yo, ssk, k3, [k2tog, yo] twice, k1, repeat from * to last 2 sts, k1, p1.
• Row 13: P1, k1, *yo, ssk, k2, [k2tog, yo] twice, k2, repeat from * to last 2 sts, k1, p1.
• Row 15: P1, k1, *yo, ssk, k1, [k2tog, yo] twice, k3, repeat from * to last 2 sts, k1, p1.
• Row 17: P1, k1, *yo, ssk, [k2tog, yo] twice, k4, repeat from * to last 2 sts, k1, p1.