Start your work with ch 24, or in multiple of 3.
R1: ch 3, 22 dc, 6dc into the last ch, 1 dc across into the other side of the ch, 5 dc into the last ch, 1 sl st into the 3rd ch.
R2: ch 3, 22 dc, 6 inc, 22 dc, 5 inc, 1 dc into the first st, 1 sl st into the 3rd ch.
R3: ch 3, 22 dc, (1 inc, 1 dc) * 6, inc, 22 dc, (1 inc, 1 dc) * 5, 1 dc into the first st, 1 sl st into the 3rd ch.
R4: ch 3, 22 dc, (1 inc, 2 dc) * 6, inc, 22 dc, (1 inc, 2 dc) * 5, 1 inc 1 dc, 1 sl st into e 3dc ch. (from now on, the last dc is replaced by the first by ch 3)
Continue with the same pattern, make your inc with this chart: