Shown with a cast-on count of 36 stitches.  

• Row 1 (RS): P2, *yo, k2tog, yo, [k2tog] 3 times, k2, yo, k3, yo, ssk, yo, p2, repeat from *.
• Rows 2, 8, 10, and 16: *K2, p15, repeat from * to last 2 sts, k2.
• Row 3: P2, *yo, k2tog, [k3tog] twice, yo, k1, yo, k2, [ssk, yo] twice, p2, repeat from * (multiple of 15 sts, plus 2).
• Rows 4, 6, 12, and 14: *K2, p13, repeat from * to last 2 sts, k2.
• Row 5: P2, *yo, k4tog, yo, k3, yo, k2, [ssk, yo] twice, p2, repeat from *.
• Row 7: P2, *yo, k2tog, yo, k1, yo, k2, ssk, yo, k2, [ssk, yo] twice, p2, repeat from * (multiple of 17 sts, plus 2).
• Row 9: P2, *yo, k2tog, yo, k3, yo, k2, [ssk] twice, [ssk, yo] twice, p2, repeat from *.
• Row 11: P2, *[yo, k2tog] twice, k2, yo, k1, yo, [sl1-k2tog-psso] twice, ssk, yo, p2, repeat from * (multiple of 15 sts, plus 2).
• Row 13: P2, *[yo, k2tog] twice, k2, yo, k3, yo, k4tog, yo, p2, repeat from *.
• Row 15: P2, *[yo, k2tog] twice, k2, yo, ssk, k2, yo, k1, yo, ssk, yo, p2, repeat from * (multiple of 17 sts, plus 2).