Shown with a cast-on count of 31 stitches.  

• Row 1 (RS): K15, p1, k15.
• Row 2: K15, p1, k15.
• Row 3: P15, k1, p3, w&t (19 sts).
• Row 4: K3, p1, k3, w&t (7 sts).
• Row 5: P3, k1, p6, w&t (10 sts).
• Row 6: K6, p1, k6, w&t (13 sts).
• Row 7: P6, k1, p9, w&t (16 sts).
• Row 8: K9, p1, k9, w&t (19 sts).
• Row 9: P9, k1, p11, w&t (21 sts).
• Row 10: K11, p1, k11, w&t (23 sts).
• Row 11: P11, k1, p13, w&t (25 sts).
• Row 12: K13, p1, k13, w&t (27 sts).
• Row 13: P13, k1, p14, w&t (28 sts).
• Row 14: K14, p1, k14, w&t (29 sts).
• Row 15: P14, k1, p15 (30 sts).
• Row 16: K15, p1, k15 (31 sts).
• Row 17: P2, yo, p13, k1, p13, yo, p2 (33 sts).
• Row 18: K16, p1, k16.
• Row 19: P2, yo, p14, k1, p14, yo, p2 (35 sts).
• Row 20: K17, p1, k17.
• Row 21: P2, yo, p15, k1, p15, yo, p2 (37 sts).
• Row 22: K18, p1, k18.
• Row 23: P2, yo, p16, k1, p16, yo, p2 (39 sts).
• Row 24: K19, p1, k19.
• Row 25: P2, yo, p17, k1, p17, yo, p2 (41 sts).
• Row 26: K20, p1, k20.
• Row 27: P2, yo, p18, k1, p18, yo, p2 (43 sts).
• Row 28: K21, p1, k21.
• Row 29: P2, yo, p19, k1, p19, yo, p2 (45 sts).
• Row 30: K22, p1, k22.
• Row 31: P2, yo, p20, k1, p20, yo, p2 (47 sts).
• Row 32: K23, p1, k23.
• Row 33: P2, yo, p21, k1, p21, yo, p2 (49 sts).
• Row 34: K24, p1, k24.
• Row 35: P2, yo, p22, k1, p22, yo, p2 (51 sts).
• Row 36: K25, p1, k25.
• Row 37: P2, yo, p23, k1, p23, yo, p2 (53 sts).
• Row 38: K26, p1, k26.
• Row 39: P2, yo, p24, k1, p24, yo, p2 (55 sts).
• Row 40: K27, p1, k27.
• Row 41: P2, yo, p25, k1, p25, yo, p2 (57 sts).
• Row 42: K28, p1, k28.
• Row 43: P2, yo, p26, k1, p26, yo, p2 (59 sts).
• Row 44: K29, p1, k29.
• Row 45: P2, yo, p27, k1, p27, yo, p2 (61 sts).
• Row 46: K30, p1, k30.
• Row 47: P2, yo, p28, k1, p28, yo, p2 (63 sts).
• Row 48: K31, p1, k31.
• Row 49: P15, k1, p15, w&t (31 sts).
• Row 50: K31.
• Row 51: P12, k1, p12, w&t (25 sts).
• Row 52: K25.
• Row 53: P9, k1, p9, w&t (19 sts).
• Row 54: K19.
• Row 55: P7, k1, p7, w&t (15 sts).
• Row 56: K15.
• Row 57: P5, k1, p5, w&t (11 sts).
• Row 58: K11.
• Row 59: P4, k1, p4, w&t (9 sts).
• Row 60: K9.
• Row 61: P3, k1, p3, w&t (7 sts).
• Row 62: K7.
• Row 63: P2, k1, p2, w&t (5 sts).
• Row 64: K5.
• Row 65: P1, k1, p1, w&t (3 sts).
• Row 66: K3.