More ideas from renata
knit. k1p3. shift every 3 rows  This seems (seems) easy enough.

via Knitting- So much yarn, so little time / knit. shift every 3 rows) Cast on multiples of Knit all right side (odd) rows. Row 2 and across. Row 6 and across to end, end with Repeat 8 rows for pattern. Or for Row 6 and start with a and end with