Shown with a cast-on count of 41 stitches.  

• Row 1 (WS): P41.
• Row 2: [P1 tbl] 3 times, (k1, p1, k1) in next st, p1, [k1 tbl, yo] 3 times, k1 tbl, [ssk] twice, [k2tog] twice, [k1 tbl, yo] 3 times, k1 tbl, [yo, k1 tbl] 3 times, [ssk] twice, [k2tog] twice, [k1 tbl, yo] 3 times, k1 tbl, p1, (k1, p1, k1) in next st, [p1 tbl] 3 times (49 sts).
• Row 3: [P1 tbl] 3 times, p1 tbl, k1, p1 tbl, k1, [p1 tbl, k1] 4 times, [p1 tbl] twice, [k1, p1 tbl] 3 times, k1, p1 tbl, [k1, p1 tbl] 4 times, [p1 tbl, k1] 4 times, p1 tbl, k1, p1 tbl, k1, p1 tbl, [p1 tbl] 3 times.
• Row 4: [P1 tbl] 3 times, (k1, p1, k1) in next st, p1, k1 tbl, p1, [k1 tbl, p1] twice, yo, ssk, 1/1 LC, [k1 tbl] twice, 1/1 RC, k2tog, yo, p1, k1 tbl, p1, k1 tbl, p1, k1 tbl, p1, yo, ssk, 1/1 LC, [k1 tbl] twice, 1/1 RC, k2tog, yo, [p1, k1 tbl] twice, p1, k1 tbl, p1, (k1, p1, k1) in next st, [p1 tbl] 3 times (53 sts).
• Row 5: [P1 tbl] 3 times, p2, [p1 tbl, k1] twice, [p1 tbl, k1] twice, p2, k1, [p1 tbl] 4 times, k1, p2, k1, p1 tbl, k1, p1 tbl, k1, p1 tbl, k1, p2, k1, [p1 tbl] 4 times, k1, p2, [k1, p1 tbl] twice, k1, p1 tbl, k1, p1 tbl, p2, [p1 tbl] 3 times.
• Row 6: [P1 tbl] 3 times, p1, (k1, p1, k1) in next st, [k1 tbl, p1] twice, k1 tbl, [p1, k1 tbl] twice, yo, ssk, 1/1 LC, 1/1 RC, k2tog, yo, [k1 tbl, p1] twice, k1 tbl, [p1, k1 tbl] twice, yo, ssk, 1/1 LC, 1/1 RC, k2tog, yo, [k1 tbl, p1] twice, k1 tbl, [p1, k1 tbl] twice, (k1, p1, k1) in next st, p1, [p1 tbl] 3 times (57 sts).
• Row 7: [P1 tbl] 3 times, p1 tbl, [k1, p1 tbl] 3 times, k1, [p1 tbl, k1] 4 times, [p1 tbl] twice, [k1, p1 tbl] 3 times, k1, p1 tbl, [k1, p1 tbl] 3 times, k1, [p1 tbl] twice, [k1, p1 tbl] 4 times, [k1, p1 tbl] 3 times, k1, [p1 tbl] 4 times.
• Row 8: [P1 tbl] 3 times, (k1, p1, k1) in next st, k2tog, yo, [p1, k1 tbl] twice, p1, [k1 tbl, p1] 3 times, yo, ssk, 1/1 LC, k2tog, yo, [p1, k1 tbl] twice, p1, k1 tbl, p1, [k1 tbl, p1] twice, yo, ssk, 1/1 LC, k2tog, yo, [p1, k1 tbl] 3 times, p1, [k1 tbl, p1] twice, yo, ssk, (k1, p1, k1) in next st, [p1 tbl] 3 times (61 sts).
• Row 9: [P1 tbl] 3 times, [p1 tbl] 4 times, p1, [k1, p1 tbl] twice, k1, [p1 tbl, k1] 3 times, p1, [p1 tbl] 4 times, p1, [k1, p1 tbl] twice, k1, p1 tbl, k1, [p1 tbl, k1] twice, p1, [p1 tbl] 4 times, p1, [k1, p1 tbl] 3 times, [k1, p1 tbl] twice, k1, p1, [p1 tbl] 7 times.
• Row 10: [P1 tbl] 3 times, k1, (k1, p1, k1) in next st, k2tog, yo, [k1 tbl, p1] 3 times, k1 tbl, [p1, k1 tbl] 3 times, yo, ssk, k2tog, yo, [k1 tbl, p1] 3 times, k1 tbl, [p1, k1 tbl] 3 times, yo, ssk, k2tog, yo, [k1 tbl, p1] 3 times, k1 tbl, [p1, k1 tbl] 3 times, yo, ssk, (k1, p1, k1) in next st, k1, [p1 tbl] 3 times (65 sts).
• Row 11: [P1 tbl] 3 times, [p1 tbl] twice, p1, [p1 tbl] twice, p1, [p1 tbl, k1] 3 times, p1 tbl, [k1, p1 tbl] 3 times, p1, [p1 tbl] twice, p1, [p1 tbl, k1] 3 times, p1 tbl, [k1, p1 tbl] 3 times, p1, [p1 tbl] twice, p1, [p1 tbl, k1] 3 times, p1 tbl, [k1, p1 tbl] 3 times, p1, [p1 tbl] twice, p1, [p1 tbl] twice, [p1 tbl] 3 times.
• Row 12: [P1 tbl] 3 times, (k1, p1, k1) in next st, [k1 tbl] 3 times, [ssk] 3 times, [yo, k1] twice, yo, [k1, yo] 3 times, [k2tog] 3 times, [ssk] 3 times, [yo, k1] twice, yo, k1, yo, [k1, yo] twice, [k2tog] 3 times, [ssk] 3 times, [yo, k1] 3 times, yo, [k1, yo] twice, [k2tog] 3 times, [k1 tbl] 3 times, (k1, p1, k1) in next st, [p1 tbl] 3 times (69 sts).
• Row 13: [P1 tbl] 3 times, [p1 tbl] 3 times, p2, [p1 tbl] twice, p7, p8, [p1 tbl] twice, p7, p1, p7, [p1 tbl] twice, p8, p7, [p1 tbl] twice, p2, [p1 tbl] 3 times, [p1 tbl] 3 times.
• Row 14: [P1 tbl] 3 times, (k1, p1, k1) in next st, yo, [k1 tbl] 3 times, k2tog, [ssk] 3 times, [yo, k1] twice, yo, [k1, yo] 3 times, [k2tog] 3 times, [ssk] 3 times, [yo, k1] twice, yo, k1, yo, [k1, yo] twice, [k2tog] 3 times, [ssk] 3 times, [yo, k1] 3 times, yo, [k1, yo] twice, [k2tog] 3 times, ssk, [k1 tbl] 3 times, yo, (k1, p1, k1) in next st, [p1 tbl] 3 times (73 sts).
• Row 15: [P1 tbl] 3 times, [p1 tbl] 3 times, p4, [p1 tbl] twice, p7, p8, [p1 tbl] twice, p7, p1, p7, [p1 tbl] twice, p8, p7, [p1 tbl] twice, p4, [p1 tbl] 3 times, [p1 tbl] 3 times.
• Row 16: [P1 tbl] 3 times, (k1, p1, k1) in next st, k1 tbl, yo, k1, yo, k1 tbl, [k2tog] twice, [ssk] 3 times, [yo, k1] twice, yo, [k1, yo] 3 times, [k2tog] 3 times, [ssk] 3 times, [yo, k1] twice, yo, k1, yo, [k1, yo] twice, [k2tog] 3 times, [ssk] 3 times, [yo, k1] 3 times, yo, [k1, yo] twice, [k2tog] 3 times, [ssk] twice, k1 tbl, yo, k1, yo, k1 tbl, (k1, p1, k1) in next st, [p1 tbl] 3 times (77 sts).
• Row 17: [P1 tbl] 3 times, [p1 tbl] 3 times, p6, [p1 tbl] twice, p7, p8, [p1 tbl] twice, p7, p1, p7, [p1 tbl] twice, p8, p7, [p1 tbl] twice, p6, [p1 tbl] 3 times, [p1 tbl] 3 times.
• Row 18: [P1 tbl] 3 times, (k1, p1, k1) in next st, [k2tog, yo] twice, [[k1 tbl, yo] 3 times, k1 tbl, [ssk] twice, [k2tog] twice, [k1 tbl, yo] 3 times] twice, k1 tbl, [[yo, k1 tbl] 3 times, [ssk] twice, [k2tog] twice, [k1 tbl, yo] 3 times, k1 tbl] twice, [yo, k2tog] twice, (k1, p1, k1) in next st, [p1 tbl] 3 times (89 sts).
• Row 19: [P1 tbl] 3 times, p1 tbl, [k1, p1 tbl] twice, [k1, [p1 tbl, k1] 4 times, [p1 tbl] twice, [k1, p1 tbl] 3 times] twice, k1, [p1 tbl, [k1, p1 tbl] 4 times, [p1 tbl, k1] 4 times, p1 tbl, k1] twice, p1 tbl, [k1, p1 tbl] twice, [p1 tbl] 3 times.