Shown with a cast-on count of 49 stitches.  

• Row 1 (RS): K1, k2tog, [yo, k1, k2tog] 15 times, yo, k1.
• Rows 2, 4, 6, 8, 10, and 12: Purl.
• Row 3: K2tog, yo, [k1, k2tog, yo] 15 times, k2.
• Row 5: K2, [k2tog, yo, k1] 15 times, k2.
• Row 7: K1, yo, [ssk, k1, yo] 15 times, ssk, k1.
• Row 9: K2, [yo, ssk, k1] 15 times, yo, ssk.
• Row 11: K2, [k1, yo, ssk] 15 times, k2.