Shown with a cast-on count of 16 stitches.  

• Round 1: P8 tbl, [1/1 RPT] 4 times.
• Round 2: P7 tbl, [1/1 RPT] 4 times, p1 tbl.
• Round 3: P5 tbl, pfb, [1/1 RPT] 4 times, p2 tbl (17 sts).
• Round 4: P6 tbl, [1/1 RPT] 4 times, p3 tbl.
• Round 5: P4 tbl, pfb, [1/1 RPT] 4 times, p4 tbl (18 sts).
• Round 6: P5 tbl, [1/1 RPT] 4 times, p5 tbl.
• Round 7: P3 tbl, pfb, [1/1 RPT] 4 times, p6 tbl (19 sts).
• Round 8: P4 tbl, [1/1 RPT] 4 times, p7 tbl.
• Round 9: P2 tbl, pfb, [1/1 RPT] 4 times, p8 tbl (20 sts).
• Round 10: P3 tbl, [1/1 RPT] 4 times, p9 tbl.
• Round 11: P1 tbl, pfb, [1/1 RPT] 4 times, p10 tbl (21 sts).
• Round 12: P2 tbl, [1/1 RPT] 4 times, p11 tbl.
• Round 13: P1, [1/1 RPT] 4 times, p12 tbl.