Set up and finish: RS: P1, k2, repeat to last 4 sts, p1, k2, p1. WS: K1, p2, repeat to last 4 sts, k1, p2, k1.
Shown with a cast-on count of 16 stitches.
1 2 3 4 5 Horizontal repeats
1 2 3 4 5 Vertical repeats