Shown with a cast-on count of 50 stitches.  

• Rows 1, 3, 5, 9, 11, 13, 15, 17, 19, 23, and 25 (WS): Purl to last 2 sts, k1, p1.
• Rows 2, 4, 6, 8, 10, 12, 16, 18, 20, 22, 24, and 26: P1, knit.
• Row 7: [P11, p2tog] 3 times, p9, k1, p1 (47 sts).
• Row 14: P1, [k10, ssk] 3 times, k10 (44 sts).
• Row 21: [P9, p2tog] 3 times, p9, k1, p1 (41 sts).