Shown with a cast-on count of 35 stitches.  

• Row 1 (RS): K16, sl2-k1-p2sso, k16 (33 sts).
• Rows 2, 4, 6, 8, 10, 12, 14, 16, 18, and 20: Purl.
• Row 3: K15, sl2-k1-p2sso, k15 (31 sts).
• Row 5: K15, yo, k1, yo, k15 (33 sts).
• Row 7: K5, M1L, k2, sl2-k1-p2sso, k2, M1L, k2, M1L, k2, yo, k1, yo, k2, M1L, k2, M1L, k2, sl2-k1-p2sso, k2, M1L, k5 (37 sts).
• Row 9: K5, M1L, k2, sl2-k1-p2sso, k2, M1L, k4, M1L, k2, yo, k1, yo, k2, M1L, k4, M1L, k2, sl2-k1-p2sso, k2, M1L, k5 (41 sts).
• Row 11: K5, M1L, k2, sl2-k1-p2sso, k2, M1L, k6, M1L, k2, yo, k1, yo, k2, M1L, k6, M1L, k2, sl2-k1-p2sso, k2, M1L, k5 (45 sts).
• Row 13: K5, M1L, k2, sl2-k1-p2sso, k2, M1L, k8, M1L, k2, yo, k1, yo, k2, M1L, k8, M1L, k2, sl2-k1-p2sso, k2, M1L, k5 (49 sts).
• Row 15: K5, M1L, k2, sl2-k1-p2sso, k2, M1L, k10, M1L, k2, yo, k1, yo, k2, M1L, k10, M1L, k2, sl2-k1-p2sso, k2, M1L, k5 (53 sts).
• Row 17: K5, M1L, k2, sl2-k1-p2sso, k2, M1L, k12, M1L, k2, yo, k1, yo, k2, M1L, k12, M1L, k2, sl2-k1-p2sso, k2, M1L, k5 (57 sts).
• Row 19: K5, M1L, k2, sl2-k1-p2sso, k2, M1L, k14, M1L, k2, yo, k1, yo, k2, M1L, k14, M1L, k2, sl2-k1-p2sso, k2, M1L, k5 (61 sts).