1st Row - Single crochet.
2nd Row - * Single crochet in 1st stitch, single crochet around 2nd stitch. * Repeat across row.
3rd Row - * Single crochet around single crochet of previous row, single crochet through both loops of twisted stitch. * Repeat 2nd and 3rd rows.
Source: Woolco Knitting & Crocheting Manual