Shown with a cast-on count of 1 stitch.  

• Rows 1, 3, 5, 7, 9, and 11 (WS): Purl.
• Row 2: (K1, yo, k1) in next st (3 sts).
• Row 6: K1, [k1, yo] twice (5 sts).
• Row 8: K3, [yo, k1] twice (7 sts).
• Row 10: K3, [yo, k1] 4 times (11 sts).
• Row 12: K2, ssk, k1, [yo, k1] 4 times, k2tog (13 sts).
• Row 14: K2, ssk, k2, [yo, k1] 3 times, yo, k2, k2tog (15 sts).
• Round 16: K2, ssk, k3, [yo, k1] 3 times, yo, k3, k2tog (17 sts).
• Round 18: K2, ssk, k4, [yo, k1] 3 times, yo, k4, k2tog (19 sts).
• Round 20: K2, ssk, k5, [yo, k1] 3 times, yo, k5, k2tog (21 sts).
• Round 22: K2, ssk, k6, [yo, k1] 3 times, yo, k6, k2tog (23 sts).
• Round 24: K2, ssk, k7, [yo, k1] 3 times, yo, k7, k2tog (25 sts).
• Round 26: K2, ssk, k8, [yo, k1] 3 times, yo, k8, k2tog (27 sts).
• Round 28: K2, ssk, k9, [yo, k1] 3 times, yo, k9, k2tog (29 sts).
• Round 30: K2, ssk, k11, yo, k1, yo, k11, k2tog.
• Round 32: K2, yo, ssk, k11, yo, k1, yo, k11, k2tog, yo (31 sts).
• Round 34: K2, yo, k1, yo, ssk, k1, k2tog, yo, k17, yo, ssk, k1, k2tog, yo, k1, yo (33 sts).
• Round 36: K2, k2tog, yo, yo, k1, sl1-k2tog-psso, yo, k19, yo, sl1-k2tog-psso, k1, yo, yo, ssk.
• Round 38: K2, yo, ssk, k2tog, yo, yo, ssk, ssk, k1, k2tog, yo, k9, yo, ssk, k1, k2tog, k2tog, yo, yo, ssk, k2tog, yo (31 sts).
• Round 40: Yo, k2, yo, k2tog, yo, yo, ssk, k2tog, yo, yo, sl1-k2tog-psso, yo, k11, yo, sl1-k2tog-psso, yo, yo, ssk, k2tog, yo, yo, ssk (33 sts).
• Round 42: Yo, k1, yo, k3, yo, k2, k2tog, yo, yo, ssk, k3, yo, ssk, k7, k2tog, yo, k3, k2tog, yo, yo, ssk, k2 (36 sts).
• Round 44: [K1, yo] twice, k3, yo, k2, yo, [k2tog, yo, yo, ssk] twice, k2, yo, ssk, k5, k2tog, yo, k2, [k2tog, yo, yo, ssk] twice (40 sts).
• Round 46: [K1, yo] 4 times, k3, yo, k1, yo, ssk, k1, yo, k2, [k2tog, yo, yo, ssk] twice, k1, yo, ssk, k3, k2tog, yo, k1, [k2tog, yo, yo, ssk] twice, k2tog, yo (46 sts).
• Round 48: Ssk, [k1, yo] 4 times, k1, k2tog, k2, k1 tbl, yo, yo, ssk, ssk, k1, yo, [k2tog, yo, yo, ssk] 3 times, yo, ssk, k1, k2tog, [k2tog, yo, yo, ssk] 3 times (48 sts).
• Round 50: Ssk, k2, [yo, k1] 3 times, yo, k2, k2tog, k2, yo, ssk, k2tog, yo, ssk, k1, yo, k2, [k2tog, yo, yo, ssk] twice, k2tog, yo, yo, k1, sl1-k2tog-psso, [yo, yo, ssk, k2tog] 3 times, yo (50 sts).