Shown with a cast-on count of 3 stitches.  

• Row 1 (RS): [Yo, k1] 3 times, yo (7 sts).
• Rows 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, and 24: Purl.
• Row 3: [Yo, k1] 5 times, yo, k2tog, yo (13 sts).
• Row 5: [Yo, k2tog] 5 times, yo, k3tog, yo.
• Row 7: [Yo, k1] 11 times, yo, k2tog, yo (25 sts).
• Row 9: Yo, k3tog, [yo, k2tog] 11 times, yo.
• Row 11: [Yo, k2tog] 11 times, yo, k3tog, yo.
• Row 13: Yo, k2tog, [yo, k1] 23 times, yo (49 sts).
• Row 15: [Yo, k2tog] 23 times, yo, k3tog, yo.
• Row 17: Yo, k3tog, [yo, k2tog] 23 times, yo.
• Row 19: [Yo, k1] 47 times, yo, k2tog, yo (97 sts).
• Row 21: Yo, k3tog, [yo, k2tog] 47 times, yo.
• Row 23: [Yo, k2tog] 47 times, yo, k3tog, yo.