Shown with a cast-on count of 19 stitches.  

• Row 1 (RS): K2, (k1, yo, k1) in next st, k13, (k1, yo, k1) in next st, k2 (23 sts).
• Row 2: K2, yo, purl to last 2 sts, yo, k2 (25 sts).
• Row 3: K2, (k1, yo, k1) in next st, k3, *yo, k1, yo, k2, ssk, k2, k2, k2tog, k2, repeat from * to last 6 sts, yo, k3, (k1, yo, k1) in next st, k2 (30 sts).
• Row 4: K2, yo, purl to last 2 sts, yo, k2 (32 sts).
• Row 5: K2, (k1, yo, k1) in next st, k6, *yo, k3, yo, k2, ssk, k1, k1, k2tog, k2, yo, k1, repeat from * to last 9 sts, k6, (k1, yo, k1) in next st, k2 (37 sts).
• Row 6: K2, yo, purl to last 2 sts, yo, k2 (39 sts).
• Row 7: K2, (k1, yo, k1) in next st, k9, yo, *k5, yo, k2, ssk, k2tog, k2, yo, repeat from * to last 14 sts, k11, (k1, yo, k1) in next st, k2 (44 sts).
• Row 8: K2, yo, purl to last 2 sts, yo, k2 (46 sts).
• Row 9: K2, (k1, yo, k1) in next st, k13, yo, *k2, ssk, k4, k2tog, k2, yo, k1, yo, repeat from * to last 17 sts, k14, (k1, yo, k1) in next st, k2 (51 sts).
• Row 10: K2, yo, purl to last 2 sts, yo, k2 (53 sts).
• Row 11: K2, (k1, yo, k1) in next st, k17, yo, *k2, ssk, k2, k2tog, k2, yo, k2, yo, repeat from * to last 21 sts, k18, (k1, yo, k1) in next st, k2 (58 sts).
• Row 12: K2, yo, purl to last 2 sts, yo, k2 (60 sts).
• Row 13: K2, (k1, yo, k1) in next st, k21, *yo, k2, ssk, k2tog, k2, yo, k4, yo, k1, repeat from * to last 23 sts, k20, (k1, yo, k1) in next st, k2 (65 sts).
• Row 14: K2, yo, purl to last 2 sts, yo, k2 (67 sts).
• Row 15: K2, (k1, yo, k1) in next st, k24, *yo, k1, yo, k2, ssk, k2, k2, k2tog, k2, yo, repeat from * to last 27 sts, k24, (k1, yo, k1) in next st, k2 (72 sts).
• Row 16: K2, yo, purl to last 2 sts, yo, k2 (74 sts).
• Row 17: K2, (k1, yo, k1) in next st, k27, *yo, k3, yo, k2, ssk, k1, k1, k2tog, k2, yo, repeat from * to last 31 sts, k28, (k1, yo, k1) in next st, k2 (79 sts).
• Row 18: K2, yo, purl to last 2 sts, yo, k2 (81 sts).
• Row 19: K2, (k1, yo, k1) in next st, k30, yo, *k5, yo, k2, ssk, k2tog, k2, yo, repeat from * to last 35 sts, k32, (k1, yo, k1) in next st, k2 (86 sts).
• Row 20: K2, yo, purl to last 2 sts, yo, k2 (88 sts).
• Row 21: K2, (k1, yo, k1) in next st, k34, yo, *k2, ssk, k4, k2tog, k2, yo, k1, yo, repeat from * to last 38 sts, k35, (k1, yo, k1) in next st, k2 (93 sts).
• Row 22: K2, yo, purl to last 2 sts, yo, k2 (95 sts).
• Row 23: K2, (k1, yo, k1) in next st, k38, yo, *k2, ssk, k2, k2tog, k2, yo, k2, yo, repeat from * to last 42 sts, k39, (k1, yo, k1) in next st, k2 (100 sts).
• Row 24: K2, yo, purl to last 2 sts, yo, k2 (102 sts).
• Row 25: K2, (k1, yo, k1) in next st, k42, *yo, k2, ssk, k2tog, k2, yo, k4, yo, k1, repeat from * to last 44 sts, k41, (k1, yo, k1) in next st, k2 (107 sts).
• Row 26: K2, yo, purl to last 2 sts, yo, k2 (109 sts).
• Row 27: K2, (k1, yo, k1) in next st, k45, *yo, k1, yo, k2, ssk, k2, k2, k2tog, k2, yo, repeat from * to last 48 sts, k45, (k1, yo, k1) in next st, k2 (114 sts).
• Row 28: K2, yo, purl to last 2 sts, yo, k2 (116 sts).
• Row 29: K2, (k1, yo, k1) in next st, k48, *yo, k3, yo, k2, ssk, k1, k1, k2tog, k2, yo, repeat from * to last 52 sts, k49, (k1, yo, k1) in next st, k2 (121 sts).
• Row 30: K2, yo, purl to last 2 sts, yo, k2 (123 sts).
• Row 31: K2, (k1, yo, k1) in next st, k51, yo, *k5, yo, k2, ssk, k2tog, k2, yo, repeat from * to last 56 sts, k53, (k1, yo, k1) in next st, k2 (128 sts).
• Row 32: K2, yo, purl to last 2 sts, yo, k2 (130 sts).
• Row 33: K2, (k1, yo, k1) in next st, k55, yo, *k2, ssk, k4, k2tog, k2, yo, k1, yo, repeat from * to last 59 sts, k56, (k1, yo, k1) in next st, k2 (135 sts).
• Row 34: K2, yo, purl to last 2 sts, yo, k2 (137 sts).
• Row 35: K2, (k1, yo, k1) in next st, k59, yo, *k2, ssk, k2, k2tog, k2, yo, k2, yo, repeat from * to last 63 sts, k60, (k1, yo, k1) in next st, k2 (142 sts).
• Row 36: K2, yo, purl to last 2 sts, yo, k2 (144 sts).