Shown with a cast-on count of 4 stitches.  

• Row 1 (RS): [K1 tbl, yo, k1, yo] twice (8 sts).
• Rows 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, and 28: Knit.
• Row 3: [K1 tbl, yo, k3, yo] twice (12 sts).
• Row 5: [K1 tbl, yo, k5, yo] twice (16 sts).
• Row 7: [K1 tbl, yo, k2, kfb, kfb, k3, yo] twice (24 sts).
• Row 9: [K1 tbl, yo, k4, kfb, kfb, k5, yo] twice (32 sts).
• Row 11: [K1 tbl, yo, k6, kfb, kfb, k7, yo] twice (40 sts).
• Row 13: [K1 tbl, yo, k8, kfb, kfb, k9, yo] twice (48 sts).
• Row 15: [K1 tbl, yo, k5, k3tog, yo, k2, kfb, kfb, k3, yo, sl2-k1-p2sso, k5, yo] twice (52 sts).
• Row 17: [K1 tbl, yo, k4, k3tog, yo, (k1, p1) in next st, yo, k3, kfb, kfb, k4, yo, (k1, p1) in next st, yo, sl2-k1-p2sso, k4, yo] twice (64 sts).
• Row 19: [K1 tbl, yo, k3, k3tog, yo, (k1, p1) in next st, k2tog, yo, k2tog, k3, kfb, kfb, k4, ssk, yo, k2tog, (k1, p1) in next st, yo, sl2-k1-p2sso, k3, yo] twice (68 sts).
• Row 21: [K1 tbl, yo, k2, k3tog, yo, (k1, p1) in next st, k2tog, (k1, p1) in next st, yo, k2tog, k4, [(k1, p1) in next st] twice, k5, ssk, yo, (k1, p1) in next st, k2tog, (k1, p1) in next st, yo, sl2-k1-p2sso, k2, yo] twice (76 sts).
• Row 23: [K1 tbl, yo, k1, k3tog, yo, [(k1, p1) in next st, k2tog] twice, yo, k2tog, k5, [(k1, p1) in next st] twice, k6, ssk, yo, [k2tog, (k1, p1) in next st] twice, yo, sl2-k1-p2sso, k1, yo] twice (80 sts).
• Rows 26 and 30: Knit.