Shown with a cast-on count of 41 stitches.  

• Row 1 (RS): K1, [yo, ssk] 9 times, k3, [k2tog, yo] 9 times, k1.
• Rows 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46, and 48: Purl.
• Rows 3, 5, and 7: M1R, [yo, ssk] 9 times, yo, k5tog, [yo, k2tog] 9 times, yo, M1L.
• Rows 9, 11, 13, and 15: K2, M1R, [yo, ssk] 8 times, yo, k5tog, [yo, k2tog] 8 times, yo, M1L, k2.
• Row 17: K1, k2tog, yo, k1, M1R, [yo, ssk] 7 times, yo, k5tog, [yo, k2tog] 7 times, yo, M1L, k1, yo, ssk, k1.
• Row 19: K2tog, yo, k2, M1R, [yo, ssk] 7 times, yo, k5tog, [yo, k2tog] 7 times, yo, M1L, k2, yo, ssk.
• Row 21: K4, M1R, [yo, ssk] 7 times, yo, k5tog, [yo, k2tog] 7 times, yo, M1L, k4.
• Row 23: K2, k2tog, yo, k2, M1R, [yo, ssk] 6 times, yo, k5tog, [yo, k2tog] 6 times, yo, M1L, k2, yo, ssk, k2.
• Row 25: K1, k2tog, yo, k3, M1R, [yo, ssk] 6 times, yo, k5tog, [yo, k2tog] 6 times, yo, M1L, k3, yo, ssk, k1.
• Row 27: K2tog, yo, k2, k2tog, yo, M1R, [yo, ssk] 6 times, yo, k5tog, [yo, k2tog] 6 times, yo, M1L, yo, ssk, k2, yo, ssk.
• Row 29: K3, k2tog, yo, k3, M1R, [yo, ssk] 5 times, yo, k5tog, [yo, k2tog] 5 times, yo, M1L, k3, yo, ssk, k3.
• Row 31: [K2, k2tog, yo] twice, M1R, [yo, ssk] 5 times, yo, k5tog, [yo, k2tog] 5 times, yo, M1L, [yo, ssk, k2] twice.
• Row 33: K1, k2tog, yo, k2, k2tog, yo, k1, M1R, [yo, ssk] 5 times, yo, k5tog, [yo, k2tog] 5 times, yo, M1L, k1, yo, ssk, k2, yo, ssk, k1.
• Row 35: [K2tog, yo, k2] twice, k2tog, yo, M1R, [yo, ssk] 4 times, yo, k5tog, [yo, k2tog] 4 times, yo, M1L, [yo, ssk, k2] twice, yo, ssk.
• Row 37: K3, k2tog, yo, k2, k2tog, yo, k1, M1R, [yo, ssk] 4 times, yo, k5tog, [yo, k2tog] 4 times, yo, M1L, k1, yo, ssk, k2, yo, ssk, k3.
• Row 39: [K2, k2tog, yo] 3 times, M1R, [yo, ssk] 3 times, yo, k5tog, [yo, k2tog] twice, yo, k2tog, yo, M1L, [yo, ssk, k2] 3 times.
• Row 41: K1, [k2tog, yo, k2] twice, k2tog, yo, k1, M1R, [yo, ssk] 3 times, yo, k5tog, [yo, k2tog] twice, yo, k2tog, yo, M1L, k1, [yo, ssk, k2] twice, yo, ssk, k1.
• Row 43: [K2tog, yo, k2] 3 times, k2tog, yo, M1R, [yo, ssk] twice, yo, k5tog, [yo, k2tog] twice, yo, M1L, [yo, ssk, k2] 3 times, yo, ssk.
• Row 45: K3, [k2tog, yo, k2] twice, k2tog, yo, k3, M1R, yo, ssk, yo, k5tog, yo, k2tog, yo, M1L, k3, [yo, ssk, k2] twice, yo, ssk, k3.
• Row 47: [K2, k2tog, yo] 4 times, k2, M1R, yo, k5tog, yo, M1L, [k2, yo, ssk] 4 times, k2.
• Row 49: BO (0 sts).