Shown with a cast-on count of 38 stitches.  

• Row 1 (RS): [K1, p1] twice, k2, k2tog, yo, *k6, [k2tog, yo] twice, repeat from * to last 10 sts, k5, [p1, k1] twice, p1.
• Rows 2, 4, 6, 8, 10, 12, 14, 16, 18, and 20: [P1, k1] twice, purl to last 5 sts, [k1, p1] twice, k1.
• Row 3: [K1, p1] twice, k1, k2tog, yo, *k6, [k2tog, yo] twice, repeat from * to last 11 sts, k6, [p1, k1] twice, p1.
• Row 5: [K1, p1] twice, k5, *yo, ssk, k1, [k2tog, yo] twice, k3, repeat from * to last 9 sts, yo, ssk, k2, [p1, k1] twice, p1.
• Row 7: [K1, p1] twice, k4, *[yo, ssk] twice, k1, k2tog, yo, k3, repeat from * to last 10 sts, [yo, ssk] twice, [k1, p1] 3 times.
• Row 9: [K1, p1] twice, k5, *[yo, ssk] twice, k6, repeat from * to last 9 sts, [yo, ssk] twice, [p1, k1] twice, p1.
• Row 11: [K1, p1] twice, k6, *[yo, ssk] twice, k6, repeat from * to last 8 sts, yo, ssk, [k1, p1] 3 times.
• Row 13: [K1, p1] twice, k7, *[yo, ssk] twice, k6, repeat from * to last 7 sts, yo, ssk, [p1, k1] twice, p1.
• Row 15: [K1, p1] twice, k3, k2tog, yo, *k3, [yo, ssk] twice, k1, k2tog, yo, repeat from * to last 9 sts, k4, [p1, k1] twice, p1.
• Row 17: [K1, p1] twice, k2, [k2tog, yo] twice, *k3, yo, ssk, k1, [k2tog, yo] twice, repeat from * to last 8 sts, k3, [p1, k1] twice, p1.
• Row 19: [K1, p1] twice, k1, [k2tog, yo] twice, *k6, [k2tog, yo] twice, repeat from * to last 9 sts, k4, [p1, k1] twice, p1.