Shown with a cast-on count of 41 stitches.  

• Rounds 1, 3, 13, and 15: [K1 tbl, ssk, k2, yo, k1, yo, k2, k2tog] 4 times, k1 tbl.
• Rounds 2, 4, 14, and 16: [K1 tbl, k9] 4 times, k1 tbl.
• Round 5: [K1, yo, k2tog, k5, ssk, yo] 4 times, k1.
• Rounds 6, 8, 10, and 12: Knit.
• Round 7: [K2, yo, k2tog, k3, ssk, yo, k1] 4 times, k1.
• Round 9: [K3, yo, k2tog, k1, ssk, yo, k2] 4 times, k1.
• Round 11: [K4, yo, sl2-k1-p2sso, yo, k3] 4 times, k1.
• Round 17: [Yo, k1 tbl, yo, ssk, k2, yo, k1, yo, k2, k2tog] 4 times, yo, k1 tbl (50 sts).
• Round 18: [K1, k1 tbl, k10] 4 times, k1, k1 tbl.
• Repeat rounds 1-16.