Shown with a cast-on count of 38 stitches.  

• Rows 1 and 3 (WS): K2, *k1, p1, repeat from * to last 2 sts, k2.
• Row 2: P2, k2tog, [p1, k1] 6 times, M1R, p1, ctr dbl inc, p1, k1, p1, ctr dbl inc, p1, M1L, [p1, k1] 5 times, p1, ssk, p2 (42 sts).
• Row 4: P2, k2tog, [p1, k1] 6 times, p1, M1R, p1, ctr dbl inc, k1, p1, k1, p1, k1, ctr dbl inc, p1, M1L, [p1, k1] 6 times, ssk, p2 (46 sts).