I think the pattern author is a Mathematician or a software engineer.
Did you notice the "p0" in the ending of the row?
k1, p0, 71 sts.
A Math person would read that as p naught or purl naught.
In context, the pattern is 3 sts long so two repeats would be 6 stitches. Patt4: follow pattern for 4 sts then next 2 (of 6) are p together. The instructions give this decrease pattern twice before telling you to repeat 13 times. 13+1 = 14 and 14 *5 (p2tog reduces from 6 to 5 sts in the 14 repeats.
Then the follow the k1, p pattern for the end of row as k1, p0.
Total for dec row is 71 sts
Now, either they are a mathematician, programmer, engineer, or simply OCD with the k[COLOR="Blue"]x[/COLOR],p[COLOR="Blue"]y[/COLOR] pattern repetitions. [/COLOR]